I've been thinking this one on and off for 10 years. My 88 GW has a problem with the right rear window. The signal is weak. I've cleaned the switches but that was a marginal improvement. I could replace just the wires but that may not do it since the electricity path has issues.
I'd like to swap in a pair of relays. I think it would be really simple to add them in to each of the doors. It would require 2 relays per window motor per door.
I also want to fix the power locks. Connect a battery directly to them and they work fine. Through the switch, not so well. Again the most logical solution is the relay. Again this would take 2 relays per door.
Lastly would be the tailgate which would require 2 relays. I'd wire them all the same and according to my diagram below. The battery to actually run the motor would come from the battery over a 10 ga wire with a 20A fuse.
I made my own headlight harness based off of a diagram I got from another website (Camaro?). Anyway, am I wrong? Am I right?