Left rear indicator not working on Citroen C4 Picasso, Diesel, 2011

Posted 20th Oct 2021
Sorry, another car issue. My left rear indicator is not working. The indicator stick is ticking away really fast though. I took it to the garage who said that the bulb holder was partially burnt and to get another one. I've bought a replacement and have just fitted it myself (after googling how to do that). I also put in the brand new bulbs that I got today. However, the indicator stick is still ticking fast, but the indicator is not flashing still.

I've read that it could be the relay switch that needs replacing. Just wondering, is it the same relay switch that operates the front and back left indicators (not two separate relay switches) - only asking, as the left front indicator is working fine?

I've looked at an online manual for my car and it shows the relevant fuse boxes/fuses and does say relays as well. However, I can't see a number or picture of the location at all in the manual for the number that refers to the left rear indicator (my main fuse box is on left side under the glove compartment - two others are located under the boot).

Relay switches don't seem to be that expensive, so I wandering if it is easy to swap one over myself - but at the moment, I can't find the location of it anywhere? Any advice would be appreciated. Thank you.
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  1. Avatar
    Whenever I hear the words Citroen or Peugeot and diesel I shudder....Hope that car is pre-adblue before the problems all started with the tank and low pressure faults on so many including my wife's Citroen Cactus we quickly traded in else it would have been the best part of 1K to put right.

    Have you tried any Citroen forums digging around to see if you can get a PDF of the service manual?
  2. Avatar
    If you hear it ticking, turn on stalk and feel the relays.
    Is this the location.
  3. Avatar
    Author
    bigwheels20/10/2021 13:54

    Here are some fuse box types and fuse …Here are some fuse box types and fuse labels.https://fuseandrelay.com/citroen/c4-picasso.html


    On the photos, my main fuse box is located at the front on the passenger side. I've looked further down at other boxes and there is one saying F20 7.5A electric tailgate - does anybody know if this is the one that possibly needs changing - to sort out the fast flashing left indicator and for it to light up (bulb has been changed)? Thank you.
  4. Avatar
    How do you know the replacement bulb was not broken?
  5. Avatar
    Sophiasky20/10/2021 14:18

    On the photos, my main fuse box is located at the front on the passenger …On the photos, my main fuse box is located at the front on the passenger side. I've looked further down at other boxes and there is one saying F20 7.5A electric tailgate - does anybody know if this is the one that possibly needs changing - to sort out the fast flashing left indicator and for it to light up (bulb has been changed)? Thank you.


    Sorry I dont know, But Ive seen mechanics find all the fuse boxes and still not know which on it is.
    The turn on the flasher to the side that works and touch each relay until they feel it clicking.
    As above the new bulb could be shot.
    Did you have the ignition on when changing the bulb, canbus systems dont like that.
    I had it on my vectra.
    Turned the car off and came back later and bulb was working.
  6. Avatar
    Sophiasky20/10/2021 14:18

    I've bought a replacement and have just fitted it... However, the …I've bought a replacement and have just fitted it... However, the indicator stick is still ticking fast...

    This is the giveaway statement, although it is a relay that is ticking fast, not the stalk. The relay is likely a bimetallic-type where the flash rate is dictated by the load passing through it, and where one bulb not being in the circuit reduces the load causing a faster flash rate for the other bulbs that are in the circuit and the corresponding faster tick rate.
    In this circumstance it is highly unlikely you have a defective relay. Your issue is far more likely to be due to either
    an open circuit for the non-flashing bulb (wiring connector / light assembly connector / light assembly internal connectivity)
    or open circuit / damaged wiring in the indicator supply cable to the light assembly
    (or possibly busted earth to / in / around the light assembly, but not if other bulbs in the same assembly are functioning ok).

    If you have changed the holder / entire light assembly for a known-functional holder / light assembly, the likely issue is a fault in the wiring cable to the light assembly but more likely a fault in the wiring connector to the light assembly.

    If you purchased a used replacement and did not view the indicator bulb functioning on the replacement you may have purchased a replacement with what you describe as the same common fault as your defective unit.
  7. Avatar
    I had this with my Peugeot.

    Im pretty sure I solved it by putting an earth cable and connecting it to the chassis.

    It was a long time ago tho, I will see if I can find the info tho - might also not be the same issue tho.
  8. Avatar
    Author
    Thank you for all your advice and help. The left indicator is now working. After a suggestion, I decided to go and try some other bulbs that I had. It turned out that the twin packet of new bulbs that I bought this morning, both had bulbs in it that were not working. I picked them up from Wilkos earlier, so they might have been dropped at some point. I'm not sure if Wilkos do refunds on bulbs though (I paid £4 for them).
  9. Avatar
    Sophiasky20/10/2021 15:58

    Thank you for all your advice and help. The left indicator is now working. …Thank you for all your advice and help. The left indicator is now working. After a suggestion, I decided to go and try some other bulbs that I had. It turned out that the twin packet of new bulbs that I bought this morning, both had bulbs in it that were not working. I picked them up from Wilkos earlier, so they might have been dropped at some point. I'm not sure if Wilkos do refunds on bulbs though (I paid £4 for them).


    Great news!! i had a feeling this was getting over thought!
  10. Avatar
    Sophiasky20/10/2021 15:58

    Thank you for all your advice and help. The left indicator is now working. …Thank you for all your advice and help. The left indicator is now working. After a suggestion, I decided to go and try some other bulbs that I had. It turned out that the twin packet of new bulbs that I bought this morning, both had bulbs in it that were not working. I picked them up from Wilkos earlier, so they might have been dropped at some point. I'm not sure if Wilkos do refunds on bulbs though (I paid £4 for them).


    How about the catalytic converter?
  11. Avatar
    Author
    compadre20/10/2021 19:38

    How about the catalytic converter?


    Due to not having had a working rear, left indicator and a broken bulb holder, I've had to wait for the bulb holder to turn up. I've only just managed to fit it this afternoon, along with the new bulbs. I drive to Tiverton and Willand (Cullompton) twice a week, but haven't been able to take the car out for a long, fast drive down the motorway yet. I'm due to go down to Willand this weekend, so I'm planning on trying to clear the error message then by doing the drive. I found a PDF manual of my car and it says that when the message comes up about the filter clogging, to drive it down the motorway at at least 40 mph for about 5 minutes. However, I have noticed others saying that they had done long drives and the error message did not clear, so I will have to see what happens. Thank you.
  12. Avatar
    Sophiasky20/10/2021 20:06

    Due to not having had a working rear, left indicator and a broken bulb …Due to not having had a working rear, left indicator and a broken bulb holder, I've had to wait for the bulb holder to turn up. I've only just managed to fit it this afternoon, along with the new bulbs. I drive to Tiverton and Willand (Cullompton) twice a week, but haven't been able to take the car out for a long, fast drive down the motorway yet. I'm due to go down to Willand this weekend, so I'm planning on trying to clear the error message then by doing the drive. I found a PDF manual of my car and it says that when the message comes up about the filter clogging, to drive it down the motorway at at least 40 mph for about 5 minutes. However, I have noticed others saying that they had done long drives and the error message did not clear, so I will have to see what happens. Thank you.


    I have not seen your whole story about your car but you need to separate the "pub talk" from the facts when it comes to DPFs.

    There are more variables than a "5 Min drives at 40 MPH" its really not really how it works.

    Unless i am mistaken the Citroens used an "taken advantage" system to empty the DPFs at any opportunity, not always when they were "full". There is no indication in the car that the DPG clean has happened.

    The only way to do a "forced regen" on those Citroens is with a plug in diagnostic tool. The tool can also tell you the amount of clogging.

    That "DPF risk of clogging" light on the Citroen can indicate any number of problems that can cause clogging and could be faulty sensor. IE, Your DPF is at risk b/c the car cannot get a reading from a sensor etc.

    Best bet is to join the C4 owners or a Citroen club. You can then connect with someone who has the diagtool, maybe for free and you will not be stabbing around in the dark.
  13. Avatar
    Author
    Just an update on my left rear indicator. I replaced the bulb holder several weeks ago now and up until a few days ago, everything was working fine. About two days ago, I noticed that when the indicator was turned off, sometimes it would keep ticking away for an extra 2 seconds or so. Yesterday, all was good but on returning home in the afternoon, the fast ticking started up again for the left indicator (the one that I had issues with before). I tried a replacement bulb and it was flashing before I replaced the light cover, however, as soon as I refitted the cover to the car and tried again, it wouldn't work. The side light (in the same bulb holder) then also stopped working, but on wiggling it a bit in the holder, it came on, but also wouldn't work when the cover was fixed back on the car. I tried several more bulbs and now neither of them is working (the left indicator or the side light - in the same bulb holder).

    I went to buy some replacement bulbs last night but the assistant in the shop said they'd test the bulbs that I already had (which I thought didn't work/were faulty), but they were both fine. I read online that it could possible be an issue with the bulbs not touching the metal connectors correctly in the bulb holder, and somebody suggested pulling them up a bit, which I haven't tried/don't know how to do that. I'm also thinking that it could be an issue with the plug piece (containing several coloured wires) that goes into the bulb holder. Another person said there could be a fuse that operates that cluster of lights that needs replacing. Has anybody got any suggestions as to what the current issue could be (rather than just take the car to a garage, particularly if it could be a simple fix for myself)? Thank you.
  14. Avatar
    Sophiasky16/11/2021 16:31

    Just an update on my left rear indicator. I replaced the bulb holder …Just an update on my left rear indicator. I replaced the bulb holder several weeks ago now and up until a few days ago, everything was working fine. About two days ago, I noticed that when the indicator was turned off, sometimes it would keep ticking away for an extra 2 seconds or so. Yesterday, all was good but on returning home in the afternoon, the fast ticking started up again for the left indicator (the one that I had issues with before). I tried a replacement bulb and it was flashing before I replaced the light cover, however, as soon as I refitted the cover to the car and tried again, it wouldn't work. The side light (in the same bulb holder) then also stopped working, but on wiggling it a bit in the holder, it came on, but also wouldn't work when the cover was fixed back on the car. I tried several more bulbs and now neither of them is working (the left indicator or the side light - in the same bulb holder).I went to buy some replacement bulbs last night but the assistant in the shop said they'd test the bulbs that I already had (which I thought didn't work/were faulty), but they were both fine. I read online that it could possible be an issue with the bulbs not touching the metal connectors correctly in the bulb holder, and somebody suggested pulling them up a bit, which I haven't tried/don't know how to do that. I'm also thinking that it could be an issue with the plug piece (containing several coloured wires) that goes into the bulb holder. Another person said there could be a fuse that operates that cluster of lights that needs replacing. Has anybody got any suggestions as to what the current issue could be (rather than just take the car to a garage, particularly if it could be a simple fix for myself)? Thank you.


    You could try some electrical contact cleaner on the connector and the bulb connection points. They tend to corrode. Could use WD40 etc..
  15. Avatar
    Author
    .MUFC.16/11/2021 19:16

    You could try some electrical contact cleaner on the connector and the …You could try some electrical contact cleaner on the connector and the bulb connection points. They tend to corrode. Could use WD40 etc..


    Sorry, when you say on the connector - are you on about the piece/plug (with wires going into it) that gets pushed into the bulb holder (I'm assuming the bulb connection points are the metal-looking plates that the end of the bulb touches). Would you use a cotton bud or similar to do this and wouldn't it then be greasy? Thank you.
  16. Avatar
    Sophiasky16/11/2021 19:33

    Sorry, when you say on the connector - are you on about the piece/plug …Sorry, when you say on the connector - are you on about the piece/plug (with wires going into it) that gets pushed into the bulb holder (I'm assuming the bulb connection points are the metal-looking plates that the end of the bulb touches). Would you use a cotton bud or similar to do this and wouldn't it then be greasy? Thank you.


    Yes that is correct, You could use a cotton bud, obviously using it carefully. The contact cleaner/wd40 soon evaporates. Being a little greasy won't be a problem.
    Edited by: ".MUFC." 16th Nov 2021
  17. Avatar
    Author
    .MUFC.16/11/2021 20:03

    Yes that is correct, You could use a cotton bud, obviously using it …Yes that is correct, You could use a cotton bud, obviously using it carefully. The contact cleaner/wd40 soon evaporates. Being a little greasy won't be a problem.


    Thank you for the advice, I will try that later.
  18. Avatar
    Author
    Sophiasky16/11/2021 20:30

    Thank you for the advice, I will try that later.


    Just looking on line. does it have to be the actual WD40 specialist contact cleaner or just normal WD40 (which I have here)? Thank you.
  19. Avatar
    Sophiasky16/11/2021 16:31

    Just an update on my left rear indicator. I replaced the bulb holder …Just an update on my left rear indicator. I replaced the bulb holder several weeks ago now and up until a few days ago, everything was working fine. About two days ago, I noticed that when the indicator was turned off, sometimes it would keep ticking away for an extra 2 seconds or so. Yesterday, all was good but on returning home in the afternoon, the fast ticking started up again for the left indicator (the one that I had issues with before). I tried a replacement bulb and it was flashing before I replaced the light cover, however, as soon as I refitted the cover to the car and tried again, it wouldn't work. The side light (in the same bulb holder) then also stopped working, but on wiggling it a bit in the holder, it came on, but also wouldn't work when the cover was fixed back on the car. I tried several more bulbs and now neither of them is working (the left indicator or the side light - in the same bulb holder).I went to buy some replacement bulbs last night but the assistant in the shop said they'd test the bulbs that I already had (which I thought didn't work/were faulty), but they were both fine. I read online that it could possible be an issue with the bulbs not touching the metal connectors correctly in the bulb holder, and somebody suggested pulling them up a bit, which I haven't tried/don't know how to do that. I'm also thinking that it could be an issue with the plug piece (containing several coloured wires) that goes into the bulb holder. Another person said there could be a fuse that operates that cluster of lights that needs replacing. Has anybody got any suggestions as to what the current issue could be (rather than just take the car to a garage, particularly if it could be a simple fix for myself)? Thank you.


    It'll be a bad earth socket on the multi-connector plug that plugs into the light cluster if the side light is affected too. You can try cleaning the multi connector contacts with contact cleaner & while your at it look to see if one is a bit blackened. The earth carrys all the current for all the bulbs put together & if there's been an intermittent connection it overheats and blackens the plug.

    Best way to overcome long term is to bypass it with a seperate earth to the chassis. Thats what Bob24601 mentioned earlier & I had to do the same on my Peugeot.
    Edited by: "gazdoubleu" 16th Nov 2021
  20. Avatar
    Sophiasky16/11/2021 20:36

    Just looking on line. does it have to be the actual WD40 specialist …Just looking on line. does it have to be the actual WD40 specialist contact cleaner or just normal WD40 (which I have here)? Thank you.

    It's better to use contact cleaner but ordinary WD40 should also work. People have been using it for years on cars electrical parts. It can attract grime though.
  21. Avatar
    Author
    gazdoubleu16/11/2021 20:52

    It'll be a bad earth socket on the multi-connector plug that plugs into …It'll be a bad earth socket on the multi-connector plug that plugs into the light cluster if the side light is affected too. You can try cleaning the multi connector contacts with contact cleaner & while your at it look to see if one is a bit blackened. The earth carrys all the current for all the bulbs put together & if there's been an intermittent connection it overheats and blackens the plug.Best way to overcome long term is to bypass it with a seperate earth to the chassis. Thats what Bob24601 mentioned earlier & I had to do the same on my Peugeot.


    I'm going to buy the electrical contact cleaner mentioned by .MUFC. above tomorrow and try it out. If one is a bit blackened, will the spray get rid of that then or is it past repair? I've looked at the instructions and it says to just spray it on and let it dry - would that be enough, or would I have to use a cotton bud to rub over the contacts (also, are we talking about seconds/minutes for it to dry or a lot longer)? Thank you.
  22. Avatar
    Sophiasky16/11/2021 21:03

    I'm going to buy the electrical contact cleaner mentioned by .MUFC. above …I'm going to buy the electrical contact cleaner mentioned by .MUFC. above tomorrow and try it out. If one is a bit blackened, will the spray get rid of that then or is it past repair? I've looked at the instructions and it says to just spray it on and let it dry - would that be enough, or would I have to use a cotton bud to rub over the contacts (also, are we talking about seconds/minutes for it to dry or a lot longer)? Thank you.




    at the 2.10 mark you can see him take the bulb out and you can see a metal springy bit underneath. Check thats clean, like it is in the video. If it's dirty, black or whatever, lightly scraping it with a small screwdriver can clean any residue off, and make sure it's up high enough to be touching the bulb, again, a small screwdriver under it, and gently raise it can help.
    If it isn't that then it's likely to be a bad earth. An auto electrician should be able to check it in minutes for you.
  23. Avatar
    Author
    julieallen16/11/2021 21:15

    [Video] at the 2.10 mark you can see him take the bulb out and you can see …[Video] at the 2.10 mark you can see him take the bulb out and you can see a metal springy bit underneath. Check thats clean, like it is in the video. If it's dirty, black or whatever, lightly scraping it with a small screwdriver can clean any residue off, and make sure it's up high enough to be touching the bulb, again, a small screwdriver under it, and gently raise it can help.If it isn't that then it's likely to be a bad earth. An auto electrician should be able to check it in minutes for you.


    Thank you for the video. I actually watched this several weeks ago as I needed to find out how to replace and locate the bulb holder in my car - very good video. I will also check to see if it's up high enough to be touching the bulb as well.
  24. Avatar
    Sophiasky16/11/2021 21:03

    I'm going to buy the electrical contact cleaner mentioned by .MUFC. above …I'm going to buy the electrical contact cleaner mentioned by .MUFC. above tomorrow and try it out. If one is a bit blackened, will the spray get rid of that then or is it past repair? I've looked at the instructions and it says to just spray it on and let it dry - would that be enough, or would I have to use a cotton bud to rub over the contacts (also, are we talking about seconds/minutes for it to dry or a lot longer)? Thank you.


    Spray the contact cleaner into the female socket and vigourously plug and unplug it onto the light cluster. I think once the plug has overheated its a continual weak connection because the slightly melted plastic housing is not supporting the contact as it should.

    I fiddled about with bending the contact a bit with a jewellers screwdriver and abrading it with a sliver of emery board cut from my wifes nail file with limited success. If its the same as the peugeot its a bit of a crap design. Easy to clean the male contacts on the light cluster but you wont get a cotton bud anywhere close to the female.

    Mine eventually went again but I also have a trailer board I use occasionally that draws even more current through that earth.

    Bypassing it altogether involves using a heavyish wire with a ring terminal either end, riveted or self tapped on a bulky part of the galvanised earth bus (light cluster) with the other end connected to the chassis ground. You can either make your own hole or find a good ground somewhere to an unpainted bolt fixed to the chassis. Always something somewhere behind the boot carpet.

    saabcentral.com/thr…58/
    Edited by: "gazdoubleu" 16th Nov 2021
  25. Avatar
    Author
    gazdoubleu16/11/2021 21:32

    Spray the contact cleaner into the female socket and vigourously plug and …Spray the contact cleaner into the female socket and vigourously plug and unplug it onto the light cluster. I think once the plug has overheated its a continual weak connection because the slightly melted plastic housing is not supporting the contact as it should.I fiddled about with bending the contact a bit with a jewellers screwdriver and abrading it with a sliver of emery board cut from my wifes nail file with limited success. If its the same as the peugeot its a bit of a crap design. Easy to clean the male contacts on the light cluster but you wont get a cotton bud anywhere close to the female.Mine eventually went again but I also have a trailer board I use occasionally that draws even more current through that earth.Bypassing it altogether involves using a heavyish wire with a ring terminal either end, riveted or self tapped on a bulky part of the galvanised earth bus (light cluster) with the other end connected to the chassis ground. You can either make your own hole or find a good ground somewhere to an unpainted bolt fixed to the chassis. Always something somewhere behind the boot carpet.https://www.saabcentral.com/threads/rear-light-ground-wire-fault.712658/


    Sorry, I have only just seen your post. I went and bought a can of WD40 for electronics yesterday (not the normal WD40) and sprayed both parts of the socket going into the light cluster and did use cotton buds, however, that did not work. So, then I did try to bend the contacts up a bit, but that did not work either. You say to vigorously plug and unplug it into the light cluster, but mine is actually really hard to push on and pull apart - at one point I couldn't do it with my fingers and had to use a pair of pliers to grab onto one end to pull it off.

    The wires from the car (which go into the light cluster) have some black tape around them, holding them together, but I'm wondering if one or more of the wires has actually come loose in the socket bit which they are attached to - I'm not sure if that can be opened to check? Failing that, is there also a fuse for that light cluster do you know, just wondering if that has blown perhaps?

    The worst case is that I will have to take it into the garage to have the wiring redone/checked over - do you have any idea as to what I am thinking about cost wise for something like that (seriously hope it's not going to cost me a few hundred pounds for that)? Thank you.
  26. Avatar
    Sophiasky18/11/2021 18:11

    Sorry, I have only just seen your post. I went and bought a can of WD40 …Sorry, I have only just seen your post. I went and bought a can of WD40 for electronics yesterday (not the normal WD40) and sprayed both parts of the socket going into the light cluster and did use cotton buds, however, that did not work. So, then I did try to bend the contacts up a bit, but that did not work either. You say to vigorously plug and unplug it into the light cluster, but mine is actually really hard to push on and pull apart - at one point I couldn't do it with my fingers and had to use a pair of pliers to grab onto one end to pull it off.The wires from the car (which go into the light cluster) have some black tape around them, holding them together, but I'm wondering if one or more of the wires has actually come loose in the socket bit which they are attached to - I'm not sure if that can be opened to check? Failing that, is there also a fuse for that light cluster do you know, just wondering if that has blown perhaps?The worst case is that I will have to take it into the garage to have the wiring redone/checked over - do you have any idea as to what I am thinking about cost wise for something like that (seriously hope it's not going to cost me a few hundred pounds for that)? Thank you.


    I havent a clue what it would cost I'm afraid. My mechanic charges £40 an hour labour but a job like that I'd take to an Auto electrician if I couldn't solve it.

    If it was mine Id find the biggest galvanised track on the cluster which will be connected to the metal of the bulb holders, follow it back to where it goes in the connector. That will be the earth. Video below also talks about likely colour codes of the wires

    Examine that carefully for corrosion and or blackening. If its clean, then you'll need to put a continuity meter betweeen it and a bolt that looks connected somewhere to the chassis (everything turned off). It should show more or less the same resistance as the same connector to ground on the other light cluster, proably under 10 ohms.

    No harm in taking a bit of tape off to see whats going on and looking in the owners manual to tell you which fuses to look at.

    Yours might not be the same fault as mine but the fact another totally seperate bulb is affected makes me think earth.

    If you're savvy you could do all the things in this video with a patch cable (like a mini jump lead with croc clips either end) without cutting into anything to see if it bypasses the fault. You wouldn't cut the earth wire, just earth the earth strap in the cluster to a bolt in the chassis. You can test it without putting it back into the light bezel.
    Edited by: "gazdoubleu" 18th Nov 2021
  27. Avatar
    Author
    gazdoubleu18/11/2021 19:47

    I havent a clue what it would cost I'm afraid. My mechanic charges £40 an …I havent a clue what it would cost I'm afraid. My mechanic charges £40 an hour labour but a job like that I'd take to an Auto electrician if I couldn't solve it.If it was mine Id find the biggest galvanised track on the cluster which will be connected to the metal of the bulb holders, follow it back to where it goes in the connector. That will be the earth. Video below also talks about likely colour codes of the wiresExamine that carefully for corrosion and or blackening. If its clean, then you'll need to put a continuity meter betweeen it and a bolt that looks connected somewhere to the chassis (everything turned off). It should show more or less the same resistance as the same connector to ground on the other light cluster, proably under 10 ohms.No harm in taking a bit of tape off to see whats going on and looking in the owners manual to tell you which fuses to look at.Yours might not be the same fault as mine but the fact another totally seperate bulb is affected makes me think earth.If you're savvy you could do all the things in this video with a patch cable (like a mini jump lead with croc clips either end) without cutting into anything to see if it bypasses the fault. You wouldn't cut the earth wire, just earth the earth strap in the cluster to a bolt in the chassis. You can test it without putting it back into the light bezel. [Video]


    This is a really good video, thank you. However, before attempting to do something like this, wouldn't it be best to check to see if the fuse has blown for the light cluster - I don't know if there is one and/or which one it would be in the fuse box (I have a Citroen C4 Picasso)? Thank you.
  28. Avatar
    Hi I have the same problem with a picasso c4 but I find that the conector to tail light to earth it was complect missing I by pass it but I have power to brack and light but indicator it come no power everything front mirror indicator is function but back left not working can help me someone where is fuse or can be like audi the hazard switch to be faulty?thanks
  29. Avatar
    cheru.florin13/03/2022 19:55

    Hi I have the same problem with a picasso c4 but I find that the conector …Hi I have the same problem with a picasso c4 but I find that the conector to tail light to earth it was complect missing I by pass it but I have power to brack and light but indicator it come no power everything front mirror indicator is function but back left not working can help me someone where is fuse or can be like audi the hazard switch to be faulty?thanks


    Take the whole light cluster out and plug it into the opposite side. If you've bypassed the earth and the front indicator is working + stop/tail this will at least help you isolate whether its problems in the cluster or not.
  30. Avatar
    Well you learn something new every day. I drive a lot in France, I didn't even know French cars were fitted with indicators.
    Edited by: "joyf4536" 13th Mar
  31. Avatar
    gazdoubleu13/03/2022 20:30

    Take the whole light cluster out and plug it into the opposite side. If …Take the whole light cluster out and plug it into the opposite side. If you've bypassed the earth and the front indicator is working + stop/tail this will at least help you isolate whether its problems in the cluster or not.


    It is working but in left side I have no signal on if I switch them in the right side it function both
  32. Avatar
    Not likely a fuse as probably more than one lighting circuit on one fuse.

    Not likely the flasher relay as if it was the front flasher wouldn't work.

    More likely a wiring fault caused by overheating / oxidisation / water ingress.

    Trace the wire that supplies the positive power to the rear flasher bulb. Pierce the insulation with a pin somewhere along the wire to make a connection to the copper wire inside. Attach (with a crocodile clip) the positive meter lead to the pin. Attached the negative lead to a known good earth. If there is power in the wire (with the indicator on) the voltage shown on the multimeter should fluctuate up and down. If it does the problem is probably a contact in the terminal socket that slides onto the light cluster.

    If there's no power in the wire you probably need an auto electrician.
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