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Avant boot lid light and boot ceiling courtesy light...

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by DALE_AVANT, Mar 11, 2012.

  1. DALE_AVANT

    DALE_AVANT Avantage
    Audi Avant Owner Group Audi A4

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    Hi all.

    I noticed this week that neither the red&clear light on the inside of the bootlid, nor the courtesy light on the boot ceiling are working. The other interior courtesy ceiling lights work as they should.


    I have checked all bulbs (one in the boot and 2 in the courtesy light), and replaced the boot lid one as it had gone.


    Locked and unlocked car, ignition on and off, and these 2 lights are still not working (I have also tried the ceiling light switch in all 3 positions).


    Does anyone know which fuse corresponds to these 2 lights so I can check it.
     
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  3. DALE_AVANT

    DALE_AVANT Avantage
    Audi Avant Owner Group Audi A4

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    Any ideas on this one?
     
  4. quattrojames

    quattrojames Moderator
    Staff Member Moderator Audi Avant Owner Group Audi A6

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    Is there a fuse listed?

    Have you got power to the bulb? Maybe a dodgy boot microswitch.
     
  5. Woorlord

    Woorlord shifting to Hyperspace... .
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    Power for roof lights and boot lights come from the Convenience Module and supplied by various fuses.

    The following circuit shows fuses associated with convenience module:
    [​IMG]

    And here we see the front and mid interior lights:
    [​IMG]
    The items in green shows the main power take off for the roof items, known as post [B250]

    Here is the saloon boot wiring (red highlighted items are not used on the Avant),
    [​IMG]
    And you can see where the power is linked across - shown above in green.

    And the boot lights for the Avant are shown below:

    [​IMG]

    And here is the boot switch diagram:

    [​IMG]

    With this info you should be able to check wire colours for breaks at the various "hinge" points on the tail gate.

    So hope this helps.
     
    #4 Woorlord, Mar 12, 2012
    Last edited: Mar 12, 2012
  6. stu_m

    stu_m Well-Known Member
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    Open the boot and check on the dash to see if its showing that its open also open the boot and lock the doors if the indicators flash and the alarm sets its a break in the wiring or the micro switch

    you only have to do one of the above as they will give the same answer!

    Check this before anything else its the easiest and the cheapest
     
  7. DALE_AVANT

    DALE_AVANT Avantage
    Audi Avant Owner Group Audi A4

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    Thank you for the help thus far James/Woorlord/Stu.

    Checked the conv. module fuses at 24 and 38 and both seem OK.

    Checked the door graphic on the dash and it does not register when the boot or O/S/R door are opened.

    Also (not sure if this is linked), my boot release button on the keyfob does not work currently.

    So in summary, are we looking at boot micro-switch as the issue? Would this affect the rear (bootspace) ceiling lights too?
     
  8. stu_m

    stu_m Well-Known Member
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    i would go for the wiring first

    find where it goes in to the tail gate remove trim where you need to and peel back the rubber and check the wiring

    i have the saloon and it was the wiring its a common problem is the wiring breaking yes if its a break in the wiring its not showing the door as open so wont put the lights on

    as for the door i recon that will be wiring too
     
  9. Woorlord

    Woorlord shifting to Hyperspace... .
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    Circuits added to post #4 above.
     
  10. haytch75

    haytch75 Member

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    I have this same problem. My car isn't recognising when the boot is open. I'll have a look at the wiring at the hinges. This might seem like a daft question but is the microswitch in the tailgate lock/latch mechanism?
     
  11. stu_m

    stu_m Well-Known Member
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    yeah it will be in the lock and you have to replace the whole lock unit but check the wiring first
     
  12. DALE_AVANT

    DALE_AVANT Avantage
    Audi Avant Owner Group Audi A4

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    Superb help, thank you all.

    I will report back once I have rectified :icon_thumright:
     
  13. jamesey

    jamesey Member

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    did u sort this mines the same?
     

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