For Pre-89:
1. Find the fog light relay, cut the white/green wire (pin 3) and ground it.
2. Find the fog light switch, cut the red/black wire (pin 4) and connect it to a switched +12VDC power source. See Note
For 89+:
1. Find the fog light relay, cut the red/black wire (Pin 1) and connect it to a switched +12VDC power source. See Note
2. Find the fog light switch, cut the red/green wire (Pin 4) and ground it.
Note: For example: splice it into the black/red wire (Pin 2) on the cruise control switch (pre-89) or cruise control main relay (89+), or splice it into the red/yellow wire (Pin 2) on the fog light relay, however this will result in the fog lights functioning even if the car is off.
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