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How To: Make Your Fog Lights Come On With Parking Lights

Disclaimer

I am in no way responsible for what you do on your own time with your own hands to your own car. The following information is provided for informational purposes only. Assume the worst, that the following modification COULD cause damage to your vehicle. If you choose to modify your car it is your own business and I'm not part of the equation.

Requires doing some rewiring in the headlamp switch relay.

  1. Under the dash, remove the trim panel directly below the steering wheel. There are 3 trim plugs on the top. Remove these and then remove all 5 bolts (7 mm) holding on the trim panel. Remove the trim panel (careful when dropping the panel...the light is attached to the panel), twist the light socket away from the panel and set panel aside.

  2. Look under the dash, behind the Headlight switch. You will see a small white relay. The easiest way to make SURE that this is the relay is to put you hand on the relay and cycle the fogs a few times. You should feel the relay "clicking". Pull the relay away from its mounting bracket and pull it down so its easy to work on.

  3. There are four wires on the relay:
    A. Orange/Black - ALWAYS +12 volts
    B. Orange/Yellow - +12 when fog lights are ON
    C. Black/Red - GROUND when fog light switch is turned on
    D. Orange - +12 when headlights are ON

  4. What we want to do is to fool the relay into thinking that the headlights are on, thus allowing the use of the fogs. Cut the ORANGE wire (leaving about 3 inches sticking out of the relay). Insulate the end of the ORANGE wire leading to the switch. It is no longer needed.

  5. Splice the end of the ORANGE coming out of the relay into the ORANGE/BLACK (either with a 3M splice connector, or strip a little insulation away, wrap the wires, and solder).

  6. Insulate your splice well, and TEST THE FOGS!! The first time I did this, I didn't test, put everything back, then had to rip it apart again. TEST THEM!! If they work, put the relay back up there, and replace the panel under the dash.

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