foglight relay

95 GMC Jimmy 4wd.

I bought some foglights for this car, and instead of using the switch i want to hook it up to my headlights so that they turn on when i turn on/off with the switch inside the vehicle. Now i know this:

30 12V fused

But on 87, i dont know where to connect it to the fogs. I got the 4 wires (+/-) going to the fogs, the other wires to power and ground, and then i have another set of wires which where supposed to go to a swtich. But now they should go to a relay. Can some one tell me where to connect these wires. I just can figure it out. Thanx  in advance.

Instead of hooking this circuit to the Key switch as noted just tie the wire into your headlight circuit.

You usually find a circuit on the fuse panel that has power when the key is turned on and tie the wire in to that fuse.

For the Headlight circuit you would find a fuse that is on only when the headlights are on and tie into that circuit. Sometimes you will get lucky and find a fuse that sayes Fog Lamps and your car will not have them and you can use that fuse.