I've son has had his C5 for the past seven years. Had test carried out recently and it failed because his rear fog-lights aren't working, the fronts are fine and the warning lamp lights on the dash are working but no rear fog lights..
Fitted 2 new bulbs, checked the relevant fuse, (in fact all fuses) all o.k -but still no rear fog-lights. I have looked around for a relay, which indicates from the clicking sound produced when the switch is turned on/off that a relay is situated under the existing (interior) fuses inside/under the glove box compartment .
I removed the glove-box, and can only see a PCB in this area, where the clicking is produced.
Has anybody had this problem, or offer any advice on my problem. All other rear lights are working.
Rear Foglights will not work C5 2001
Moderator: RichardW
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Re: Rear Foglights will not work C5 2001
In my experience relays are rarely the problem, I'd be tracing the wiring loom from the lamps forward, looking for damaged wires or corroded connectors.
Man is, by nature, a lazy beast, he does not need twice encouraging to do nothing.
Re: Rear Foglights will not work C5 2001
All other rear lights are working, which makes me wonder is it a faulty relay somewhere or a faulty BSI or ECM unit. Probably need to get it on a diagnostic unit.
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Re: Rear Foglights will not work C5 2001
Just a thought, does it have a towbar?
Some towbar electrics are designed to isolate the foglamps when they have something plugged in, could be playing up.
Some towbar electrics are designed to isolate the foglamps when they have something plugged in, could be playing up.
Re: Rear Foglights will not work C5 2001
Thanks Homer. Yes it has a towbar. Never used during our ownership though
Re: Rear Foglights will not work C5 2001
Thanks Homer, & Gibbo. Towbar wiring was the problem, connections or plug gone bad. Disconnected tow-bar wiring & fog-lights working perfect.