Wiper Motor - Extreme mental capacity issues - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

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post #1 of 12 (permalink) Old Mar 17th, 19, 2:23 AM Thread Starter
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Wiper Motor - Extreme mental capacity issues

Usually I'm not this challenged to solve stuff like this. I'm trying to install a wiper motor and the wiring on it is destroying my brain cells. There are 2 wires coming out of the motor, a red and a black. Where are these supposed to connect? Or are these two spade connectors supposed to connect to each other...somehow...Thank you!

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post #2 of 12 (permalink) Old Mar 17th, 19, 9:08 AM
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Re: Wiper Motor - Extreme mental capacity issues

You need to watch the following videos on You Tube from Chris Craft. He explains everything there is to know about wiper and washer pump wiring. I have learned so much A-body stuff from his channel.



Take screen shots of his diagrams, print them and take them to your car for testing.

Rick

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post #3 of 12 (permalink) Old Mar 17th, 19, 5:19 PM Thread Starter
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Re: Wiper Motor - Extreme mental capacity issues

Quote:
Originally Posted by B52bombardier1 View Post
You need to watch the following videos on You Tube from Chris Craft. He explains everything there is to know about wiper and washer pump wiring. I have learned so much A-body stuff from his channel.



how to test GM wiper motor wiring and washer pump IMPALA CUTLASS GTO NOVA CAMARO CHEVELLE - YouTube



70-72 chevelle wiper motor trouble shoot on the car - YouTube



Take screen shots of his diagrams, print them and take them to your car for testing.



Rick
Thank you for the response! Yes he has been a huge help to me since I started my project, but unfortunately he doesn't give any information specifically on these wires. They are the only thing holding me up from having working wipers so it is kind of frustrating. Every picture I see of a wiper motor online shows them going inside the mechanical part of the wiper motor, but I don't see any terminals that they are supposed to connect to inside. Anyone else have a take on this? Thanks!

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post #4 of 12 (permalink) Old Mar 17th, 19, 5:46 PM
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Re: Wiper Motor - Extreme mental capacity issues

I looked at my 70 and both I think those 2 wires should connect. There are 2wires coming out of the housing under the plug. Those 2 wires go to the motor through the rubber grommet. I have no idea why you have 2 connectors in the wire. I can speculate and say that someone choked and didn't remove one of the wires and didn't connect the one running from the motor to the terminal inside the housing.

The wires end up going from the motor to the plastic connector inside the housing you can see at 11:20 in the first video. I would not take that apart...might be a can of worms.

I'm also clueless as to what year car you are working on, but looks like 70ish.

My phone went dead, so no picture. If you can wait me out, I 'l post a picture in a little bit.
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Last edited by DUTCH MAX HEADWORK; Mar 17th, 19 at 6:08 PM.
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post #5 of 12 (permalink) Old Mar 18th, 19, 9:44 AM Thread Starter
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Re: Wiper Motor - Extreme mental capacity issues

Quote:
Originally Posted by DUTCH MAX HEADWORK View Post
I looked at my 70 and both I think those 2 wires should connect. There are 2wires coming out of the housing under the plug. Those 2 wires go to the motor through the rubber grommet. I have no idea why you have 2 connectors in the wire. I can speculate and say that someone choked and didn't remove one of the wires and didn't connect the one running from the motor to the terminal inside the housing.



The wires end up going from the motor to the plastic connector inside the housing you can see at 11:20 in the first video. I would not take that apart...might be a can of worms.



I'm also clueless as to what year car you are working on, but looks like 70ish.



My phone went dead, so no picture. If you can wait me out, I 'l post a picture in a little bit.
I apologize, yes I am working on a 70 Chevelle. I'd love to see a picture when possible, but at least now I know I'm not crazy! So it would probably be easier to take the whole motor back off to get these wires sorted before I install it? Thanks for the response! At least now I have an idea of what I'm looking for.

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post #6 of 12 (permalink) Old Mar 18th, 19, 11:07 AM
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Re: Wiper Motor - Extreme mental capacity issues

I sorted out my washer - wiper wiring using a power supply and lots of jumper wires sitting at my kitchen table. I wanted to know the motor parked and did both speeds before I bolted it to the firewall. The diagrams from Chris Craft helped but also not having to reach across the fender to do these checks was very nice.

Rick

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post #7 of 12 (permalink) Old Mar 18th, 19, 10:28 PM Thread Starter
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Re: Wiper Motor - Extreme mental capacity issues

Quote:
Originally Posted by DUTCH MAX HEADWORK View Post
I looked at my 70 and both I think those 2 wires should connect. There are 2wires coming out of the housing under the plug. Those 2 wires go to the motor through the rubber grommet. I have no idea why you have 2 connectors in the wire. I can speculate and say that someone choked and didn't remove one of the wires and didn't connect the one running from the motor to the terminal inside the housing.



The wires end up going from the motor to the plastic connector inside the housing you can see at 11:20 in the first video. I would not take that apart...might be a can of worms.



I'm also clueless as to what year car you are working on, but looks like 70ish.



My phone went dead, so no picture. If you can wait me out, I 'l post a picture in a little bit.
I went ahead and pulled the motor out for my own sanity to look at and the only solution I can come up with is that there was some kind of manufacturer screw up. Here are some pictures for our own sanity, I'm gonna try it out and see if it works. It just doesn't make sense to me why it is the way it is. The spades are both different types too, but not the type that is supposed to go together so it is throwing me off. Worst case scenario I'm back where I started. Thanks for your responses so far!



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post #8 of 12 (permalink) Old Mar 18th, 19, 11:26 PM
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Re: Wiper Motor - Extreme mental capacity issues

I've never had a motor apart. Maybe there's a terminal the wire off the white switch goes inside the motor.

I don't know the history of your wiper motor, but it kind of looks like a mixmatch rebuild they didn't get right.

The wire coming from the motor has paint or grime on it, so it could be original materials.

I think I would cut the terminals off and solder them together as close to the switch as possible to hide the splice, then heat shrink tube for protection. The cover should hide the splice. Unless you want to try your luck on motor disassembly. (can of worms?)

If you bought that from a local vendor, you might give them the "what for" and ask for another one.

I don't think you're crazy at all, someone is setting you up to think that.
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post #9 of 12 (permalink) Old Mar 19th, 19, 6:03 AM
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Re: Wiper Motor - Extreme mental capacity issues

The system depends on the wiper switch bracket getting a good ground from the dash ground strap that lays on the back of the dash board and is part of the harness ground to the headlight switch. Original dash plastic is very brittle and the screws in it holding the wiper switch may allow a poor connection.


This is for the 1970~1971 system, I believe the 1972 system has a wired ground through the plug, which is different.


On my '71, when I replaced my switch, I soldered a wire directly to the wiper switch bracket to give it a hardwired ground.

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post #10 of 12 (permalink) Old Mar 19th, 19, 6:59 AM
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Re: Wiper Motor - Extreme mental capacity issues

You have the wrong motor. I just went through this on a 69 skylark. Wipers hadn’t worked for years. Verified the motor was froze up. I bought a replacement from O’r’s. Got it home and it looked like yours. Took an old motor from my stash (70 chevelle) no extra wires, it worked but intermittently wouldn’t park. The correct replacement motor was part #40-142. No extra wires.
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post #11 of 12 (permalink) Old Mar 19th, 19, 2:50 PM
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Re: Wiper Motor - Extreme mental capacity issues

As stated above, wrong motor.


Ironically this was just covered not long ago, guess people forget....


Read my reply in this thread:

https://www.chevelles.com/forums/27-...or-w-park.html

The “flying leads” wiper motor question gets asked about once a year at least.
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post #12 of 12 (permalink) Old Mar 19th, 19, 2:52 PM Thread Starter
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Re: Wiper Motor - Extreme mental capacity issues

Quote:
Originally Posted by Coppertop View Post
As stated above, wrong motor.





Ironically this was just covered not long ago, guess people forget....





Read my reply in this thread:



https://www.chevelles.com/forums/27-...or-w-park.html



The “flying leads” wiper motor question gets asked about once a year at least.
Son of a bitch. Well, at least I got my answer now. Thank you guys for the help!

Edit: if anyone is looking to buy a brand new wiper motor for a Buick, let me know I can make you a killer deal. Unfortunately it has been too long to return it.

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