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Posted

Have fitted a witter tow bar to 2002 (52) C5 saloon and gone to put electrics in and not bought any special kit or anything just connecting wire together - oops though - dur - connected two brake light wires together thinking they needed to go to the towbar together and now the right hand side rear light cluster isn't working properly - th eonly thing that is still working is the indicator - anyone know what i need to do to get it working again - it's not the bulbs cos I have checked them and everything else seems to be working fine!!

cheers, Lindsay

Posted
With multiplexed wiring systems, it's safer to use a seven way relay. Power is taken directly from the battery, with each bulb only sending a signal to the relay. I've just finished wiring my C5 estate in this way. Start by checking your fuses.
Posted

have checked all fuses under bonnet - are there any others that I should know about - why oh why can't haynes do a bloody manual for the C5!! have bought a repair manual on CD from e-bay but hasn't arrived yet!

 

A bit confused on the multiplexed wiring front because my towbar (witter) didn't suggest I needed a relay in order to wire it up - sold with a normal wiring kit - so do I really need a relay or anything like that?

cheers, lindsay

Posted
I met with the same confusion when I bought my towbar. Some 'experts' said I didn't need relays, others said because it was multiplexed, I did. In the end, since the C5 is multiplexed, I went with the relay suggestion - and since I've fitted it, I've towed 2500miles with all lights and equipment working correctly.
Posted

I checked the witter site and I have the c28 tow bar which needs the electrical accessory kit Z22 - this doesn't have a relay. Has anyone out there wired up their C5 without a relay????????

 

cheers, Lindsay

Posted
You need a relay.........unless you want to do permenant damage to the main computor in your car.......I know because i work for a main dealer!
Posted
KFK's bloomin great - just a little bit of common sense - he pointed me in the right direction - would've helped if I'd had an owners manual - must get one!!!!
Posted

Update - have just won a twin wiring kit for a citroen C5 on e-bay - comes with a relay and buzzer and everything - and it's a genuine cit bit - here's to a properly wired up towing hitch LOL

Lindsay

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