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Isn,t it typical I am in the process of selling our T5.1 and it failed roadworthy as they found the reverse lights werent working , ok that was along with rear brake discs and rotors a bit low . Brakes is an easy fix as I have always done them myselves , but the reverse lights have me stumped . After a bit of research it seems a fuse no 15 is for those lights but mysteriously I cannot even find any fuse in any 15 position in any of the fuse boxes , I have tested every single fuse even the ones under the seat and engine bay but none are blown . I now suspect it could be a reverse light switch built into the DSG or maybe Im wrong , now what is strange when reverse is selected the reverse camera and head untit switch to those cameras so something is working . So question does anyone know if there is a switch and where is it located .
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didnt you replace the rear lights with non VW LED ones a while back? All reverse leds working? If LED, did reverse lights work when first installed?
Try your old lights?
remove a rear light and check for volts?
Im guessing there is a switch at the gear selector. Maybe it senses your camera, but not quite enough to sense reverse. Worn switch? Probably not this, i mean, switches either work or they dont, right!
any relevant fault codes?Last edited by Rebuild; 29-11-2025, 05:26 AM.Steve
04 T5 -
Yes I did replace them and they were working fine , I did plug in one of the old ones and same result . One oddball thing is I tested the trailer plug and found a signal on only one pin when the tail lights indicators etc were on . The led lights came with several electronic bits just right for the VW as the supplier sent them special to me just after they first arrived . I will hang on in case anyone comes up with another suggestion , oh and I also connected my Launch Diagnostic device which i use for recalibrating sunroofs and have not found any faults in any of the circuits in the van .Comment
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