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Power Window Relay Mod Mystery

Bowtiek10

Bowtiek10

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Recently I tried to do the standard 4 relay mod for my power windows. Diagram pictured below
Powerwindowwiring7lee01.jpg

The issue that is mind boggling to me is that I followed this, (yes I know it says Trans am but the colors are the same, thanks GM) HOWEVER all that happens is that my relays click. No window movement whatsoever. If I put my voltmeter on the plug that goes to the motor, I get 12v. I know for sure the wiring is correct because if I jumper the 86 and 30 pins, which would take me back to the original wiring style, the windows will move for me. The grounds are good too, and they would have to be otherwise my relays wouldn't click. Hoping for the best as the slow windows leave much to be desired.
Thanks in advance
 
The way they have the hot wire coming in does not make sense to me. The way I see it the power wire coming into the relay should be connected to 30 and power to the motor should be from 87. DO NOT take my word for this though. I am not very good with electrical. I am assuming these are SPST Bosch style relays?
 
I could be wrong, I guess in theory it could work either way. I have always been told to make the hot wire in as 30 and out as 87.
 
That schematic isn't going to work as is.
It tells you to run a new chassis ground to the motor. The motor in these trucks have the power and ground switch polarity to change direction.
If you ground 87A on the relays, it will work. The non- energized relay will provide ground for the motor when the other is energized.

Test it to make sure that I am correct, and not wacko...
 
6872xtc said:
That schematic isn't going to work as is.
It tells you to run a new chassis ground to the motor. The motor in these trucks have the power and ground switch polarity to change direction.
If you ground 87A on the relays, it will work. The non- energized relay will provide ground for the motor when the other is energized.

Test it to make sure that I am correct, and not wacko...
Click to expand...

That's all it took. You are the man
 
So did this make your windows faster and stronger? My front windows work fine but my tailgate window is slow and kind of weak. How is that diagram the same for the tailgate window when its only 1 window and that diagram is for 2?
 
76k5blazerr said:
So did this make your windows faster and stronger? My front windows work fine but my tailgate window is slow and kind of weak. How is that diagram the same for the tailgate window when its only 1 window and that diagram is for 2?
Click to expand...

It's a night and day difference. The big reason is that I'm running a bigger gauge wire, and there is less voltage drop compared to the 16 gauge OEM. This diagram is for my driver and passenger door, the only difference for you is that you would have less wiring which is a plus, and likely 2 relays in total instead of 4
 
Bowtiek10 said:
The issue that is mind boggling to me is that I followed this, (yes I know it says Trans am but the colors are the same, thanks GM)
Click to expand...
The wire colors may be the same, but the motors are different! Several other diagrams have been posted on CK5.
 
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