CUTLASS Power Window wiring diagram adding relays to speed up the window motors

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TURNA

Rocket Powered Basset Hound
Jul 24, 2009
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Socialist NY
So do you have the Window Turbo or the Window Racer that GbodyParts sells?

I have the window racer.

Sorry its been a while

The only thing I didnt like about it is that it is just a square box with no mounting tabs

I got mine from Dixie when they had a 10% off sale

I avoid GBodyParts like the plague when it comes to mail order.

000-PIN-J13-WR.jpg
 
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TURNA

Rocket Powered Basset Hound
Jul 24, 2009
10,955
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Socialist NY
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fleming442

Captain Tenneal
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Dec 26, 2013
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As one of the resident Sparkies, I'm ashamed to admit that I haven't done the relays yet. The Turbo doohickey is a step up transformer, which, in my opinion, will shorten the life of the motors. The problem is the voltage drop across the factory switches, mostly caused by oxidation of the contacts and wires. Theoretically, new switches should fix the issue, but that doesn't address the oxidation of the wire near the contacts on the switch plug. The relays are still providing the same voltage the car operates on while eliminating the load on the switch. I should have done it a looooong time ago, but I have a problem with pulling the pristine door panels; they'll never go back as good as they are now. That's my story, and I'm sticking to it!
 
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Roadwarrior88

Not-quite-so-new-guy
Feb 17, 2020
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?? Is no one going to mention that pins 87a of both relays have to go to ground, his diagram is missing that.
 

69hurstolds

Geezer
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Jan 2, 2006
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?? Is no one going to mention that pins 87a of both relays have to go to ground, his diagram is missing that.
Why would 87a be needed?

I'm to understand that's the NC position where it basically goes to nowhere. Window switch is positioned, to send power to 85 which grounds through 86. 30 is resting on 87a, which does nothing, then when the coil for 85/86 is energized, it takes the 30 and connects it to 87 where it picks up 12v to send to the motor.

So in my mechanical logic, 87a doesn't really have a job, nor does it need to be connected to anything because it's not needed in it's NC state. I could understand it if I needed something to turn off, but in this case, no.

What am I missing in understanding of this?

I'm only asking because I like to learn the "elekticles" and how they work so I don't accidently let smoke out of things. Not trying to be a smart azz. But I thought I understood the basic relay.
 

Roadwarrior88

Not-quite-so-new-guy
Feb 17, 2020
15
13
Because the motors recieve both power and ground through the switches. So if you install relays, one relay needs to supply power when energized, the other supplied the path to ground, and then switch, hence pin 87 is power, 87a is ground. This works for the window motors. And also for the door locks.(if your lock relay dies, you can just build one out of 2 relays)

All you have to do is look at your diagram. Start by tracing the original. Power for drivers window up, leaves the switch on the blue wire, travels through the motor, leaves the motor on the brown wire and returns to the switch to ground. That's why the switches show the "up" "down" pins in contact with the ground. So when not energized, they are grounded.

So like wise, if your "up" relay is energized, your "down" relay will be off, and the brown wire needs connected to ground to complete the circuit, so like you said, in the off position, pins 30 and 87a are in contact.
 
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69hurstolds

Geezer
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Jan 2, 2006
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D'oh! Yeah, I see what you mean. Just have to add a ground wire to the 87a because it grounds through the other relay's 87a terminal, or should. Because the relays themselves took away the feedback loop to the window switch ground path.

See? That's why I said for someone to look it over and tell me wtf I did wrong. 87a is not really providing anything but a ground path for the motor when the opposite relay is energized. It's fixed now. Thanks for the insight in correcting my error.

s-l400.jpg
 
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69hurstolds

Geezer
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Jan 2, 2006
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Basically, all the ground wires can be tied together and grounded in one place if desired, but the diagram doesn't reflect it totally, but now I think it should work.
 
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