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LM Wiper Motors - Types & Application
Posted by: Lane66m ()
Date: October 03, 2019 08:47AM

Could someone explain the if the middle photo shows a single or 2 speed wiper motor and what years it was used in the Corvair fleet.

Top photo shows a single speed wiper motor.

Bottom photo shows a 2 speed wiper motor with washer pump. It is the same as on my 66 Vairs.

I can't figure out if the middle one is a 2 speed with motor with washer pump. If it is, why doesn't it have the 4th terminal to the right. What is that terminal used for on the motor in the bottom photo?

I did a forum search and Google search and did not find answers that provided any answer.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


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Re: LM Wiper Motors - Types & Application
Posted by: joelsplace ()
Date: October 03, 2019 09:20AM

Watching with excitement. This is an area of Corvairs that I know nothing about. The only windshield wiper issues I've ever had (besides blades) are switch problems.

Joel
Northlake, TX
5 Ultravans, Lost count at 100 Corvairs...

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Re: LM Wiper Motors - Types & Application
Posted by: 66vairman ()
Date: October 03, 2019 01:51PM

Al - PM sent - don't want to post preliminary (and possibly incorrect) info until I can verify.

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Re: LM Wiper Motors - Types & Application
Posted by: Lane66m ()
Date: October 03, 2019 06:31PM

More info where I got the motors. All came from LMs. 3 - 1965s, 1 - 1966 & 1 - 1968. I did not photo body tags you build year info is gone. All I have is year date painteted on the motors.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


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Re: LM Wiper Motors - Types & Application
Posted by: flamingchariots ()
Date: October 05, 2019 09:50AM

This is a guess: The fourth terminal looks like a ground.
Can you check for continuity between that terminal and a bare spot on the shell?
Is the 4 terminal one the '68?



Edited 1 time(s). Last edit at 10/05/2019 09:55AM by flamingchariots.

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Re: LM Wiper Motors - Types & Application
Posted by: Lane66m ()
Date: October 05, 2019 10:35AM

No grounds at wiper motor. All grounded through switch.

What I can figure, the yellow wire (4th terminal) is used to activate the washer pump for timing purposes. I guess it was the easiest way to get it in service with a jumper harness and a unique wiper motor, until production picked it up with the 3 terminal motor.

I colored the illustration attached to show the 66 model's wiring colors.

A better explanation of the this configuration would still be appreciated. And the application when each washer/wiper motor was introduced in GM production

All I know about application for sure is the 4 terminal motor and jumper harness (2 speed wiper with washer) was a Factory installed feature for 1966. It is what is on both my 66s, one built November and one built May.

The 1965 model had a single speed wiper with an option for a dealer install single speed washer. This is straight out of the GM specification document.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


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Re: LM Wiper Motors - Types & Application
Posted by: 66vairman ()
Date: October 05, 2019 10:55AM

Al - your information agrees with what I PM'd. The 1967 wiring harness had a number of revisions - one revision eliminated the extra wiring harness for the two speed wiper/washer so the "D" terminal was no longer needed.

The two speed wiper/washer was standard on all 1966 model Covairs, but Chevy continued to use the extra wiring harness from the 1965 model option. So far I have NOT seen a 1966 with the three terminal wiper motor. Note both motors work the same and are available as rebuilt units.

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Re: LM Wiper Motors - Types & Application
Posted by: FLSteve ()
Date: October 05, 2019 11:56AM

So what other applications are used for the Corvair wiper motor?

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