Fog Light Wiring

ScottD3

I want your faulty electronics
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I've been trying to wire in the facelift rear fog lights and having issues.

I followed this wiring diagram
wiring_add_facelift_foglights.jpg


There is some differences between this foglight control module and mine.
I a couple of pins missing and a couple of extra pins. Missing pins 15, 17 and one other is missing. Pin 4 is not listed but its on my control unit.
I worked out which cable does what on the switches and where they go on the control unit, its all pretty much match the colour.
The problem I got is with the 3-4 thicker cables from the control unit.
Connected them up as per the diagram but nothing happens. It just drains my battery (which is now flat :().

Has any one got the wiring diagram for the UK/EU models or know how to do this?
 
here's how mine was wired for rear only

control unit connections

pin 1 white/yellow stripe (thin) not used
pin 2 grey/white stripe (thick)
goes to grey/white stripe (thick) of o.e rear fog harness and grey/white stripe (thin) pin 2 rear fog switch
pin 3 white/yellow stripe (thin) goes to white/yellow stripe (thin) pin 6 rear fog switch
pin 4 grey (thin) not used
pin 5 white/green stripe (thick) not used
pin 6 brown (thick) earth
pin 7 no wire fitted
pin 8 grey/green stripe (thick) goes to grey/green stripe o.e rear fog loom and grey/green (thin) pin 4 rear fog switch
pin 9 black/red stripe (thin) i connected to grey/green stripe of o.e front fog loom but any 12v switched should do???
pin 10 no connection
pin 11 no connection
pin 12 no connection
pin 13 no wire fitted
pin 14 yellow/black stripe (thick) not used
pin 15 no wire fitted


rear fog switch connections


pin 1 grey/blue stripe (thin) to grey/blue stripe (thin) o.e rear fog loom (illumination)
pin 2 to pin 2 control unit above
pin 3 brown (thin) to brown (thin) o.e rear fog loom (earth)
pin 4 to pin 8 control unit above
pin 5 not used
pin 6 to pin 3 control unit
 
Last edited:
Thanks kev.
It works a treat now.
No ideas what the yanks was going on about with their wiring diagram.
Its all in and ready for the MOT tomorrow.
 
I threw my fronts away. Pointless things, utilised solely by chavvy idiots, and block airflow to my intercooler.
 
Is there a 'foglight delete' part for S4's then?
 
On craigs S4 we binned the fogs and just left the round hole in the grille open.

i think someone sells fogless grilles from some foreign clime, but i dont know any more.
 

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