Quote:
Originally posted by WolfeMacleod
I make guitar pickups from scratch. I don't make wiring harnesses from scratch. It's not the difficulty that would keep me from it, it's the hacking apart my harness on an otherwise stock, pristine car.
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You do not need to touch your existing headlamp harness (except to unplug it from the headlamps, mine are still in the buckets, resting). Just disconnect the wires that go to your headlamps at the fuse block and connect these points to the relay coil (pin 86). The heavy current wires (which go from the battery, to the relay contacts, to the headlamps) are run separately. Your original factory fused circuits will now control the relay and require no changes.
This thread has much discussion on the many ways to install the relays.
Headlight Relays Redux