Power Windows and Locks

[Thomas792]

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?

[SJTD]

I don't think it'll work. It would help if you could post a schematic of the relay.

When I did this I determined that I had to mod the front switch or the both the relays would pick up when the key switch was used but I can't visualize it based on your picher of the relay.

Post #46 here: http://www.ifsja.org/forums/vb/showthre ... 564&page=5

I think my subscription with PB is still good.

[Thomas792]

Updated diagram with more things labeled. The relay is the standard Bosch type relay with a normally closed and normally open connection. Looking at the wiring diagram I cannot fully understand how the modification to the front switch affects things.

If the front switch is used, one of the wires become (+) and one stays ground. If the rear key switch is used, one of the wires becomes (+) and one stays ground. With my thoughts and diagram, the relay on the (+) side switches to the normally open circuit and power can flow through the relay to the motor, just the same as if the switch itself were acting directly upon it. I think this will work with all the door windows and power locks as well.

Do you have anything more than post #46 that shows what you did? Really interested in doing this.

[SJTD]

Sorry about the false alarm. Your set up works fine. Had to draw it out.

The difference with what I did is that I don't run the power from the front switch through the rear switch. I've got them in parallel. I'll have to find the diagram of what I did. Maybe the mod I made to the front switch wasn't required.

Made sense to me at the time.

[Thomas792]

Thanks. I figure that if I keep everything stock and just run additional (+) wires to provide (+) to the motors I'll be able to maintain sanity. Eventually I'll replace the factory wiring but not up to that task while trying to figure out how to improve it. BTW, I found a diagram on Ford Muscle Forums that basically showed the same thing.