Power windows, my last gremlin

[rcarson25]

Been chasing down all the small issues with my build and think I am on the final one. I have a 1978 Firebird with American auto wire update harness. I have the optional power window kit from AAW with the relay 30amp breaker etc. the window motors are new and I am running a 5 pin window switch instead of the stock switch. I was having issues with motors running slow and the main power wire getting hot. To the point it killed the original switch when rolling up. I decided to add 2 relays between the each switch and each motor, with everything hooked up windows are slow and wires heat up. When relays are not grounded at all 4 ground pins the windows fly but the relays buzz like crazy. Obviously something is off just not sure what. Do I need to loose the additional ground wires in the 5 pin switch to make it mirror the stock switch?

[blitzer454]

Is this how you have the switch and window motor connected?

[rcarson25]

Yes, this is the current configuration. The power coming off of the AAW relay is pin 87 of the relays. The power to the switch is a different switched power source. Everything else is wired as seen in the diagrams.

[blitzer454]

Pin 87 from each of the two relays attached to the motor should be connected directly to a fused battery source. Having the switch connected to a separate switched power source is okay as long as it is also fused.

By the way I can't see your first picture, it is too small.

[rcarson25]

Sorry pics are my worst enemy on here. The AAW relay setup is a 30amp fused power source that is what that shows. My understanding is that the relay prevents backfeed.

[rcarson25]

Figured it out. The extra grounds were causing issues. The body of the motor is the ground and the additional grounds were actually causing a short scenario. Now I need to figure out how to dial them back a little these windows move. I took the additional relays out as they were loud running at the power these motors draw.