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Old 10-12-2017, 05:42 PM   #1
Bagd72Chevy
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Wiper Motor Hot to Touch

My wiper motor is hot to the touch. Im guessing somekind of internal short. Has anyone else encountered this before?

Thanks,
Ryan
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1972 Chevy C-10-Bagged, Blown LT1, 700r4, Suicide Doors
1967 GMC- SC & Cam'd 4.8, built 4l80, 3200 stall, posi, 4.10
1967 Chevy LWB- 454 and patina
1971 Blazer - Rusty
1968 Crewcab project
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Old 10-12-2017, 09:29 PM   #2
HO455
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Re: Wiper Motor Hot to Touch

It could be low voltage to the motor. The voltage is easy to check. There are several threads on troubleshooting wiper motors and switches if you do a search. A bad ground can cause the voltage to be low too.
Or it could be too much resistance from the wiper arms and the bushing through the firewall. (Which I had on my Burban.) The resistance check would require removing the motor and running it disconnected from the arms to see if it runs cooler.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.
RIP Bob Parks.
1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377
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Old 10-12-2017, 11:08 PM   #3
Bagd72Chevy
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Re: Wiper Motor Hot to Touch

Sorry, forgot to mention this was with the switch off. Motor not spinning but it was hot. Hadnt been on all day. No wiper arms installed yet.
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Old 10-12-2017, 11:54 PM   #4
HO455
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Re: Wiper Motor Hot to Touch

That's not a good sign. Sounds like the motor is stuck out of the park position and is trying to get there. I would unplug it now! Have you removed it from the firewall? My firewall bushing was dragging so the wipers were moving at about half speed. Yours maybe worse than mine was.
Another possibility is the brushes in the motor are so worn that the motor can't turn to get back to the park position.

Here is Lockdoc's thread on wiper electrical to help you test the circuitry.

http://67-72chevytrucks.com/vboard/s...d.php?t=413551
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.
RIP Bob Parks.
1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377
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