Another Wiper Switch/Harness/Motor Thread

[RayL]

1973 Challenger Rallye
3-Speed Wiper Motor #3431 665 (73692 3562)

What RPM does your 3-Speed Wiper Motor run on Low/Med/High?

I bench tested my Wiper Motor using the car battery (car not running). It runs at ~30 RPM on Low and ~60 RPM on high.

Retested it in the car using the 3-Speed switch (car not running, linkage not connected) and get ~30 Low / ~40 Med / ~60 High.

These no-load speeds seem very low to me.

Are there RPM specifications for these motors?

Are there any tear-down / rebuild references available?

Thanks everyone

 

[EW1BH27]

Not many would have recorded that RPM measurement like you did so you might be waiting for a while. Maybe these 2 videos of mine might help. They're 2 different "077" motors, one sold, one in my car.

 

[RayL]

@EW1BH27 - I came across your videos and several other of your very informative threads while searching for information on this topic. Thanks for all the content - very helpful.

Based on the video, I estimated your 3431077 motor was running at ~30 to 35 RPM Low and ~120 RPM High. I assume the switch would run the motor at ~75 RPM in the Medium position. These are the RPM's I would expect, and this helped me determine my motor has issues.

I started removing the electrical tape from the wires on the motor and find the typical broken insulation & exposed wiring. Oh, and a hole in the casting

Are there still folks in the Mopar community that refurbish these motors at a fair price?

I'll probably disassemble it looking to see if there is anything obviously wrong but will need professional help if its more than broken wires...

 

[EW1BH27]

Are there still folks in the Mopar community that refurbish these motors at a fair price?

Well that's the kicker. That hole in your housing will obviously make a rebuild more expensive who ever you take it to. I found this 2023 comment on FABO.
"To my surprise there is an add for wiper motor rebuild by David Bass in Salem, Oregon. David will rebuild your wiper motor for $279 plus the shipping cost to his address. I contacted David and sent him my wiper motor on a Tuesday. The next Wednesday I had a completely rebuilt wiper motor in my hands. If you need his services, give him a call at 503-551-0453."

 

[RayL]

Well that's the kicker. That hole in your housing will obviously make a rebuild more expensive who ever you take it to.

Weight reduction is always costly

I had just saw YouTube video "Mopar 3 Speed Wiper Motor Restored" that mentioned "a guy in Salem, Oregon", but as a courtesy, didn't mention the guy's name without the guy's permission. Thanks for the reference!

I also found remanufactured motors at Norm's Speed Shop on eBay. And Bill Meerholz Enterprises - NOS Mopar, Restored Original and Quality Used Mopar and Chrysler Parts has a few options depending on your need / budget.

I do not have a numbers matching car, so all the above are good options for my need.

 

[EW1BH27]

Topher McGinnis comes to mind too. I’ve talked and dealt with him, nice guy.
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