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Old 05-30-2012, 09:05 AM
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I pulled the numbers off of my motor a long time ago and did a search to find out what vehical used it and came up with a school bus. I ordered the parts I needed for it and they all fit. Cann't remember the company's name where I got it from but if you want to know it I can go through my receipts and find it. I should still have it.

Brett
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Old 05-30-2012, 10:45 AM
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Interesting... sounds like many of these motors were generic and used in quite a few vehicles. If you happen to find the paperwork Brett, I'll make a sticky so folks have a reference point if they need it.
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Old 05-30-2012, 11:17 PM
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Here's the company that I got parts from to rebuild my wipers. Click on wiper parts section

Stepvan Parts Catalog

Brett
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Old 09-05-2017, 03:04 PM
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Bringing this back from the dead. I researched this weekend and came to the conclusion you need to have the pulse board and motor from the GM car to get the controls to work. I did find a diagram that gives you OFF - LO -HI functions by adding 2 relays and using the 3 wire motor. I'll post it tonight for thoughts.
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Old 09-06-2017, 05:50 PM
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I guess you didn't want anyone's thoughts on it

Well tough your going to get it anyway

Did some research and found out that GM made a none pulse wiper switch for the earlier cars.

From what I found they stopped making the none pulse version around 1990(for the camaro's and firebirds. Other models may have had it installed longer).

Also from what I found is that the wiper switches all connected the same way to the turn signal switch so you should be able to swap out the wiper switch for the earlier version.

I'm not 100% sure on this but according to what I've found you should be able to convert to the none pulse switch.

Next time I go to the wrecking yard I'll see if I can verify this.


This is a 1990's firebird wiper switch wiring diagram

None pulse wiper switch.pdf
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Old 09-07-2017, 12:01 AM
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I'll take any input especially if I can use the stock controls. Let me look at the wiring diagram and dig a bit more. Still need to post the relay picture for reference. Thanks Brett!
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Old 09-07-2017, 08:44 PM
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I just sat down and reread this all Brett and I do have the non-pulse wiper switch. All of the delay bits are done within the pulse module which is part of the wiper motor assembly. Unless I'm completely misreading what you are stating as a solution to get the wiring to work with a 3-wire motor.

Here is the wiring diagram I stumbled upon that uses 2 relays.

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Old 09-08-2017, 12:21 AM
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Had some time to research this a little more

Correct me if I'm wrong here.
It appears the pulse style wiper switch is only used if you have the intermittent feature.

The none pulse wiper switch looks to be already wired for a 3 wire motor and doesn't look to have the intermittent feature.

Purple is high

Green is Low

Gray is Park

Pink washer

Not knowing the type of wiper motor you plan on using it may have a different wiring for the park feature than the one in the diagram.

Edit:

Not sure but I think on the non pulse switch the intermittent control may be seperate



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Last edited by Brett Proctor; 09-08-2017 at 09:59 AM.
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Old 09-08-2017, 01:35 PM
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I was going to go with the replacement to the Bosch to keep things simple and direct bolt-on but I'm pulling my hair out now as to the best approach. I'm OK with OFF-LO-HI with park I don't need fancy.
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Old 09-09-2017, 12:14 AM
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It never ceases to amaze me how complicated an engineer can make things, and in the end the results are worst than the original design.


Don't know what GM was thinking of or smoking when they came up with this design.

Had some more time to look things over.

First in your 2 relay picture the motor looks to have the dynamic park feature in it that requires 4 wires not 3.

Second the switch looks to be reversed in wiring.
Instead of the hot wire going to the switch as in the factory drawing it is now used for the grounding of the relays.

No biggie just something to point out.

I see now why he is using the 2 relays. The park feature in the GM design(module) uses their own special relay that keeps the contacts closed even after the coil is deenergized until the wiper is in park.

What year is your wiper switch?? Found some small differences in the switch for the years it was used.
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