Well, I have written this one.
Which can be discussed here.
viewtopic.php?f=15&t=16765&p=169750
This is in response to a recent question about a pre-facelift car having front fog lights.
Vauxhall has always been a bit hit and miss between trim levels and model years as to what is fitted as standard, as an option, or not at all.
Waffle over, here goes.
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Before starting anything.
Remove your radiator grille.
If you have a two-pin connector taped up on each side of the grille, you have no need to add any wiring.
You simply need to fit:-
Front Fog Lights.
Front Fog Relay.
Front Fog Switch with green tell-tale light.
20 amp fuse in slot 13.
And that is it.
If the plugs are not there, sorry but you have some work to do. - Read On.
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There are three types of wiring on the Vectra-A / Cavalier where front fog lights have not been fitted.
1 - No wiring at all for front fogs.
2 - Wiring is fitted only as far as the big X 6 plug in the left foot-well kick-panel.
3 - Wiring is fitted all the way to the front bumper close to the radiator grille.
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I have a facelift 1994 Cavalier LSi.
It was fitted with wiring down to the X6 connector in the left foot-well.
The pin you need is pin 31
3rd pin down on 3rd column from the flat side of the connector drawing.
Noting that the socket is roughly "L" shaped.
I had to add the rest of the wiring into the engine bay.
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To retro-fit front fogs with the dash wiring already present -
1 -Get a suitable length of 1.5mm black wire to reach from the X6 connector, and run this through the bulk head and forward to the left front fog light.
(Make sure it passes through a protective grommit).
2 - Join a suitable length of 1mm black wire and run this from the end of the thicker black wire (at the left fog light) to the right fog light.
This creates a "parallel circuit" for the two front fog lights.
3 - Get 2 connectors and solder and sleeve these to the end of the two black wires.
These are your 12 volt feeds to the fog lights.
4 - Get two suitable lengths of 1mm brown wire. To reach the grounding bolt on the left inner wing.
5 - Get 2 connectors and solder and sleeve these to the end of the two brown wires.
These are your ground wires for the fog lights.
6 - Connect the other ends of the brown wires to the brown inner wing bolt.
7 - Fit and connect up the fog lights.
That is the engine bay done.
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In the Cabin, put a fuse in slot 13 rated at 20 amps (yellow fuse).
Fit a front fog switch into the slot on the dash.
It is an option to fit a relay in the slot in the top right corner of the fuse panel.
On my car, I have left a factory-fitted grey/yellow wire in the top relay socket.
But fitted the narrow relay in the socket below it.
My front and rear fogs work fine.
If you fit the top right fog relay, some people have reported that the front fogs did not work.
With the relay fitted,
The side lights must be on for the rear fogs to light up.
The rear fogs must be on for the fronts to light up.
Because I have the grey / yellow wire fitted, my front fogs will work even if the rear fogs are turned off.
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