fog lights

whitemare

Regular
Aug 31, 2006
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foglights

Instructions:
The following change will allow the fog lights to be turned on anytime the key is in the "run" position.. This prevents the battery from being drained if the fog lights are accidentally left on when the vehicle is turned off. The procedure applies to any 94+ Mustang with fog lights. From the factory, the fog light switch receives a 12V signal when the head lights are turned on. This signal allows the fog light switch to send a signal to the fog light relay. The operation of the switch can be changed by removing the signal from the headlights and replacing it with a signal that is present when the key is in the run position.

Procedure:
Remove the storage compartment from the center console by removing the small rubber stops, removing screws, and pulling upward to release snaps. Reach in and press the fog light switch upward out of the console. Both coupe and convertible use the same wire harness in the center console. The convertible top motor switch has a 12V power signal only when the key is in the "run" position. Obviously, the connector is located next to the fog light switch, unused on coupes. The purple/orange wire carries the 12V source. Remove the red/black wire from the fog light switch connector and cover all exposed wire with electrical tape (prevent it from grounding). On convertibles, remove the red/black wire from the fog light switch and connect a jumper from the purple/orange wire to the fog light switch, thus sending the 12V signal to both switches. Wires can be removed from their connectors by pulling the red plastic cover off the end of the connector. This exposes the clips that retain each wire. Press on the appropriate clip and pull the wire from the connector. When you cut the red/black wire do not cut it right at the connector, leave about a half inch with the connector, you will be using this to hook it back up. Do the exact same thing to the purple/orange wire if it is a coupe. Once both wires are cut, remove about a half inch of the wire covering off the existing red/black connector and the purple/orange 12v wire. Twist them together and cover it with some electrical tape. Put the new red/black connector with the purple/orange 12v wire back into the fog light connector. Both the fog light switch and convertible top switch are only energizing relays, so over loading wires and melting insulation will not occur. See diagram below.


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