Question about 2004 Pontiac Montana

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2004 Pontiac Montana. The wipers start but then stop after moving just a little and then go back down. They do not come up all the way.

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  • sebpgood Nov 15, 2010

    Never mind. The pin had fallen and needed to be put back in place

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  • 1,168 Answers

Hello Sebpgood.

O yes, the notorious GM van wiper problem.
The clutch mechanism on the wiper motors are difficult to say the least.
The spline on the shaft from the wiper motor may have slipped putting the wiper motor to wiper transmission out of synchronization.
These are tricky to get back in time.
Also there is a tab on the crank arm designed to catch the clutch that wears and/or bends down and will not allow proper operation.
Most of the time I replace the crank arm assembly as they are prone to wear.
Check all the parts on the wiper transmission for siezed pivots and bent arms.
I hope this helps you towards a repair.
Thank you for using FixYa.

KL

Posted on Nov 15, 2010

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