I have replaced my wiper motor on my 2003 montana van for the second time. Both times they only lasted for a few uses. It seemed like the wiper motor didn't operate properly on HI. LO and HI moved at similar speeds. The mechanism moves freely by hand. I don't want to burn out another wiper motor if there's another problem.

SOURCE: I have a 1999 pontiac

HI.....
On your PONTIAC MONTANA,
You don;t have to WORRY about the timing belt.
Because your have use a TIMING CHAIN.
And is suposed to be good for the life of the engine.
But you can replace, if you Know that is bad, making grinning noise,.
But DON'T for maintenance.
Is very small. that mean Hard to come damaged.

I hope this information work for you. and resolve your question.

Thank you for use fixya.

SOURCE: Timing off on Pontiac Montana wipers

On top of the window motor there is a timing cam -- there is a little tab on the bottom that is most likely broken or bent. You need to replace the cam.

Ronny Bennett Sr.

• 6988 Answers
• Posted on Dec 29, 2009

SOURCE: wipers wont work

Yes there is transmission rods,with bushings,then bushings have gave way,or the rods have popped out.

SOURCE: The windshield wiper mechanism arm fell off.

snapped wiper transmission arm back into place and it works just fine. thanks for your concern. will not need help after all...

SOURCE: windshield wiper not moving.motor works.

open the hood and at the base of the wiper arm is a little balck cap, remove this cap and under it is a nut. this nut holds the wiper arm tight onto a spline. check to see if the nut has backed off or needs to be tightened. if not remove the nut and take off the wipers, the black cowel (at the bottom of the windshield) is held on with three plugs.(one in the middle and one on each end.) and one large plug below the passanger wiper blade. the wiper assembly and motor is under this cowel.
hope this helps