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Wiper motor no plugs either side


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1988 Comanche 4.0L. Wiper motor went out. Bought a new one. Through a series of stupid stuff I won't go into, the plugs were cut from both ends. Of course, careful notes were made, intentions were good, but I lost all that stuff. I've been trying to figure this out for months.

 

What I know:

From the wiring harness, I have

White w/black stripe

Green with black stripe

Black

Blue with white stripe

Brown with black stripe

 

On the motor, I have

White

Black

Green

Blue

Red

 

Black in each case is ground, so I put them together.

In the Haynes manual, as I read it, from the harness I have:

 

Green w/blk is power. it goes to the breaker

White w/black goes to low

Blue w/white goes to high

Brown w/black goes to the park switch, and works with the green wire on that

Black is ground

 

Checking my motor with a 12v power supply,

White runs the motor on low

Red runs the motor on high

Black is ground

Which leaves green and blue. When voltage is applied to these, nothing happens. When I test with my meter, there is almost no resistance there.

 

It seems like if you go low to low, ground to ground, and high to high, I am left with Green/Blk, Brown/Blk on the truck, and blue and green on the motor. Hooking it up either of those ways, I get nothing on low or intermittent, and it runs super slow on high.

 

I have tried just about every combination of wires. I was able to get it to run on low only at one time, but now I have no idea what that combination was.

 

I'm hoping someone has an aftermarket wiper motor with the same wire colors and can help me out, or maybe just someone that understands this better than I do.

I have refreshed and modified all of my grounds, so it isn't that.

 

Thanks for any help. If you have a picture of the factory harness with wire colors or a pic of an aftermarket motor with the harness and colors, that might help me figure it out.

 

 

 

 

 

 

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3 hours ago, Ωhm said:

https://comancheclub.com/topic/12083-electrical-manual/

 

Wiper Motors have a PARK (the wipers) circuit.

 

I saw the park circuit, but the wire colors don't match up on the output side, which I figured went to the motor. On the input side, the colors match up, so I'm going with that. I've looked at the diagram long enough to understand that I can't figure it out. I think my best bet is to figure it out from viewing the connectors configuration on the motor side and on the truck side, rather than solving it as an electrical problem. 

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HI/LOW speed is pretty straight forward to the motor. PARK is a make/break switch depending on the position of motor rotation. Note B+ can only pass when the PARK switch is in a 'make' position and the Wiper Switch is in the OFF position. This will drive the motor (LO) until the PARK switch is in the 'break' position. This should add to the confusion. Hope you figure it out.

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I figured out the motor side. One wire runs the high, one ground, and one runs the low. The two others are the park circuit. There is a video on youtube that explains it all. Search this on youtube to find it: Dead Things Vlog - Windshield Wiper Motor Wiring. 

 

 

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