Ok, I know a lot of people are looking to make their OEM fogs with the OEM A B and C harness independent of the headlights. It is actually very easy.
You will need...
A blade
Wire cutters
Wire strippers
A screwdriver or 10mm socket
Electrical tape
Disclaimer: I'm not responsible for your messups, you getting in trouble with the law, ect.
This is a diagram that I made:
Basically, when the headlights are on, the blue/red on the coil side of the 4 pin relay is grounded, allowing the relay to close and the foglights to turn on. When the headlights are switched off the ground is opened, discharging the coil of the relay and turning the fogs off.
All you need to do is cut the blue/red wire that goes to the underhood fusebox and ground it, making this diagram.
The wire can be cut anywhere within about 6 inches of the A to C harness plug or anywhere in the C harness. Why only within 6 inches? Well, because there is a splice in the A harness that controls the light on the switch. If you cut before it, the indicator on the switch won't light up.
Now cut open the loom where ever you decide and look at the wires:
*WARNING!* The A and C harnesses have 2 blue/red wires in them.
To find the correct wire with the loom open just pull on one of the blue/red wires. If you see the 1 pin brown connector for the A to C harness move when you tug that wire, its NOT the correct wire to cut. The blue/red 1 pin connector is the output to the foglights themselves.
Cut the correct wire and strip off the end of the the wire that's closest to the relays in the A harness. Tape off the other side of the wire that goes to the fusebox.
Now find a nut, bolt, screw, ect. that goes into the body close to the end of the wire you just cut and stripped.
Attach the wire between your chosen fastener and the body and tighten it down.
(Camera battery died sorry!)
Now hit the foglight button and they should turn on!
If they don't, make sure you cut the correct wire. If they still don't work, check your body ground and make sure its good.
The only problem now is that anytime the button is pressed even with the key out, the fogs will be on. The easiest solution is changing the source wire.
Look at the underdash fusebox. See the 1 pin connector near the top with the large white wire coming out of it? Unplug that and move it to the plug a on the far left of the fuse box thats a little higher than the others. Now the fogs will only come on when the ignition is in the Acc or run positions.
Also, If you only want the fogs to turn on with your parking lights, you can unplug the Red/black wire and plug the white into that spot. The only problem is it puts more stress on the parking light circuit and makes them a little less bright. If you really only want them to turn on with the parking lights, I recommend you make a relay setup using the +12 w/ parking lights for the coil, and using the far right +12v constant as your switched source.
Enjoy!
You will need...
A blade
Wire cutters
Wire strippers
A screwdriver or 10mm socket
Electrical tape
Disclaimer: I'm not responsible for your messups, you getting in trouble with the law, ect.
This is a diagram that I made:
Basically, when the headlights are on, the blue/red on the coil side of the 4 pin relay is grounded, allowing the relay to close and the foglights to turn on. When the headlights are switched off the ground is opened, discharging the coil of the relay and turning the fogs off.
All you need to do is cut the blue/red wire that goes to the underhood fusebox and ground it, making this diagram.
The wire can be cut anywhere within about 6 inches of the A to C harness plug or anywhere in the C harness. Why only within 6 inches? Well, because there is a splice in the A harness that controls the light on the switch. If you cut before it, the indicator on the switch won't light up.
Now cut open the loom where ever you decide and look at the wires:
*WARNING!* The A and C harnesses have 2 blue/red wires in them.
To find the correct wire with the loom open just pull on one of the blue/red wires. If you see the 1 pin brown connector for the A to C harness move when you tug that wire, its NOT the correct wire to cut. The blue/red 1 pin connector is the output to the foglights themselves.
Cut the correct wire and strip off the end of the the wire that's closest to the relays in the A harness. Tape off the other side of the wire that goes to the fusebox.
Now find a nut, bolt, screw, ect. that goes into the body close to the end of the wire you just cut and stripped.
Attach the wire between your chosen fastener and the body and tighten it down.
(Camera battery died sorry!)
Now hit the foglight button and they should turn on!
If they don't, make sure you cut the correct wire. If they still don't work, check your body ground and make sure its good.
The only problem now is that anytime the button is pressed even with the key out, the fogs will be on. The easiest solution is changing the source wire.
Look at the underdash fusebox. See the 1 pin connector near the top with the large white wire coming out of it? Unplug that and move it to the plug a on the far left of the fuse box thats a little higher than the others. Now the fogs will only come on when the ignition is in the Acc or run positions.
Also, If you only want the fogs to turn on with your parking lights, you can unplug the Red/black wire and plug the white into that spot. The only problem is it puts more stress on the parking light circuit and makes them a little less bright. If you really only want them to turn on with the parking lights, I recommend you make a relay setup using the +12 w/ parking lights for the coil, and using the far right +12v constant as your switched source.
Enjoy!
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