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Discussion Starter · #1 ·
I have a '65 SS with the single speed wiper motor and it is really slow. Is this correct speed for one of these and if so would the two speed swap directly as long as I change the switch too or would the wiring have to be changed? If I get caught in a rainstorm like we had Friday night I'll be in big trouble.

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65 Malibu SS, Crocus Yellow with black interior. Let the fun and back pain begin.
 

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I've got a 64 with the single speed. No slow is not normal for the single speeds. Yes you can put a two speed motor in there. Along with the motor and switch, you will need the option 2-speed wire harness that runs from the switch to the wiper. These are available. If you are going to make the swap and can't find the harness, send me an email and I'll dig through catalogs.
 

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Discussion Starter · #3 ·
Well on the way home yesterday they actually started to speed up to a "normal" level but this morning they didn't work at all. I guess I'll have to change it out.

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65 Malibu SS, Crocus Yellow with black interior. Let the fun and back pain begin.
 

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Check to see that the motor housing is grounded. An ohm meeter should see continuity from the housing to body and to the black wire lug.Looking at the wiring diagram for my 66 I do not see a separate ground for the motor operation. I am assuming it uses the housing ground.If you do not have a good ground the mounting bolts may be loose or rusty. You may also just be able to temporarily touch a good ground to the housing if you do not have a meter.I am sure someone will correct me If I am wrong. Had the same problem once on a non GM car and I had to run a ground strap to the mounting screw.


Rene
66-Malibu
 

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May want to take it appart and clean it out.
I had the same thing happen on my 70 SS.
Wiper motor stopped completely. When I took it appart the grease inside was so hard the motor didn't have the power to move the screw any more. Cleaned it, re-greased it and works like new, both speeds.
 

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Most GM Motors get the ground from the switch. Positive is feed directly to the motor and by selecting which wire(s) from the field, the motor operates. Cleaning is a great idea. Most likely the brushes are gone and the commutator area of the armature has a ton of carbon on it. If you are not an electric motor guy, maybe take it to a rebuilder or get a rebuilt.
 
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