c5 hatch 2001 2.2 diesel - citroen c5 fog lights

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Tue 6 Apr 2010 16:18
c5 hatch 2001 2.2 diesel - citroen c5 fog lights - smog1

I have problem with the fog lights not working which will cause MOT failure.

Bulbs have been checked and are OK,

With ignition on and headlights selected Dash warning light for fogs illuminates but they dont work ??? help please.

By the way these are the rear fogs....no fronts fitted.

Many Thanks

Edited by smog1 on 06/04/2010 at 16:27

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Tue 6 Apr 2010 21:45
c5 hatch 2001 2.2 diesel - citroen c5 fog lights - jc2

You can't fail on front fogs anyway;it's only the rears that are a legal requirement.

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Wed 7 Apr 2010 15:57
c5 hatch 2001 2.2 diesel - citroen c5 fog lights - smog1

Exactly ....Thats why I need to find a solution.

Without working Rear Fogs, it will Fail an MOT.

Any Ideas please......Thanks

Edited by smog1 on 07/04/2010 at 15:57

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Wed 7 Apr 2010 16:43
c5 hatch 2001 2.2 diesel - citroen c5 fog lights - elekie&a/c doctor

Does the car have a tow-bar fitted?Sometimes the tow socket electrics incorporate a rear fog cut out circuit to isolate the lights when the 7 pin plug is engaged.hth

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Wed 7 Apr 2010 20:13
c5 hatch 2001 2.2 diesel - citroen c5 fog lights - smog1

Yes there is a tow bar fitted.

Ive connected a trailer board, and the fog light on that works when the car fog lamp switch is activated.

I presume from that the relays are ok, but dont know why the car fogs will not work with no trailer attached.

Can only think that the car thinks a trailer is attached due to a fault in the socket wiring ??

Any ideas.......may be re wiring the car trailer socket is the answer ??

Edited by smog1 on 07/04/2010 at 20:15

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Wed 7 Apr 2010 21:34
c5 hatch 2001 2.2 diesel - citroen c5 fog lights - elekie&a/c doctor

If the fogs are ok when tow socket connected,then the fault is probably in the tow socket.This is where the isolation contacts are situated.If you follow the wiring to the socket ,there should be 2 blue wires.Join these together and this should re-instate the fog lamps.hth

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Wed 7 Apr 2010 22:42
c5 hatch 2001 2.2 diesel - citroen c5 fog lights - smog1

Thanks for that.......just to clarify though.....only the trailer board fog light worked, with the trailer board connected.

Those on the car remained unlit,..................... is your advice still the same.

Many Thanks for your time and help

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Fri 11 Mar 2016 08:45
c5 hatch 2001 2.2 diesel - citroen c5 fog lights - RickH

Apologies for thread resurrection but in case anyone else has this problem it's the comms 2000 unit that needs to be replaced (indicator stalks etc) but if you are on a budget get a wiring diagram, trace the switch and fit a separate toggle to the dashboard somewhere!

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