From Mechanical Database
This modification allows the fog lights to always stay one, such as when using them as DRLs, just as parking lights, or even allowing them to stay on when the high beams are on. The following will also allow them to be deactivated by the ignition, as to prevent battery drainage.
- Pull out the fog light/rear defogger panel.
- Cut the violet with white tracer wire, leaving as much as possible attached to the connector for the fog light switch.
- Tape and tie the free end of the violet with white where it comes out of the harness. You don't want this shorting on anything!
- Strip the free end of the violet with white wire that's still connected to the fog light switch connector.
- Strip a small section of the white wire that comes from the rear defog switch. DO NOT cut this wire, strip a section to make a splice. This is the third wire from the top.
- Connect the stripped end of the violet with white wire to the white wire. Wrap tightly and solder. Tape and tie to prevent shorts.
Upon completion, the fog lights can be turned on anytime the ignition is on, with no headlights, with parking lights, with low beam, with high beam. This might be illegal in some areas, but many vehicles drive around with fogs and parking lights as DRLs among other things, so the chances of getting a citation may be worth it. This was tested for several hours during driving, the module removed, and remained under normal temperature to ensure there are no serious wiring hazards.