My car went in for its annual service and MOT earlier this work. It failed the MOT as the rear fog light was not working. The dealer blamed the fault on the tow bar electrics, which I doubted. Took it in yesterday to see a specialist who connected up his light board that showed the wiring to the socket was fine. He immediately diagnosed the fault as being in the wiring in the tailgate - probably a broken connection.
This will be the third time that I have had wiring problems in the tailgate. The first time was when the car was only a few months old and the horn stopped working on a number of occasions due to a fuse blowing. Went back to the dealer a few times who couldn't find the fault. Eventually I took it back and they found the wiring in the tailgate had not been routed properly and had chafed causing a short circuit. The next occasion was a few years ago when I lost my side and headlights, again due to wiring in the loom. Now I have this problem. I hope they don't spend too long tracing the fault as it could work out very exlensive at their hourly rate.
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