New wiper motor or pulse board?

Hood Scoop · 11-22-2007, 11:32 PM

On the '97 GMC Jimmy, for a few months now, windshield wipers would "stick" every once in a while. By stick I mean they would stop and a humming noise could be heard from the wiper motor. this would be a momentary thing and they would take off again. Yesterday, they stuck and stayed stuck. After a little tugging back and forth (and getting soaked) the arms "caught" and started again, only to wipe once and stop again with humming resumed.

I was planning to replace the wiper motor tomorrow, but wanted another opinion to make sure this was motor and not pulse board. With the humming, I thought the motor was sticking and was done. But didn't know if a faulty pulse board would cause this problem. Any thoughts? Thanks!

doh · 11-23-2007, 07:53 AM

The pulse board failing, is pretty common. But being a 97, I would go ahead and replace the whole motor.

tom3 · 11-23-2007, 10:47 AM

The board problem would probably be a loose connection at a solder joint, pretty easy to spot if so. If it all looks fine I'd replace the whole deal to be sure.

**GMCSonoma** · 11-23-2007, 11:40 AM

Do a tap test with the head of a screwdriver & if it works again...the board...

Likely the issue, I'd start there as they are not usually included with a motor...

motorman · 11-24-2007, 10:22 AM

my 88 silverado wiper will not shut off sometimes and the washers do not work. what do i need to do to fix this ????

**GMCSonoma** · 11-24-2007, 10:53 AM

Quote:

Originally Posted by motorman

my 88 silverado wiper will not shut off sometimes and the washers do not work. what do i need to do to fix this ????

Same thing...try a circuit board first...assuming you have delay wipers...

Hood Scoop · 11-24-2007, 11:04 AM

I just replaced both parts. Good as new!

**GMCSonoma** · 11-24-2007, 11:11 AM

Quote:

Originally Posted by Hood Scoop

I just replaced both parts. Good as new!

Both??? Kind of expen$ive....

I can't tell you the last time I sold a wiper motor itself for one of those...8 of 20 times it's the pulse board itself.

Well, at least it buys you piece of mind, and that's 99% of the battle!

01cavalier · 11-24-2007, 04:24 PM

When I worked for customer service it was almost always the board, motor failures were uncommon, I dealt with a lot of these. At least it's an easy fix.

slls · 11-25-2007, 11:03 AM

It is a cheap fix, if you own a soldering gun and some solder.

Triple-X08 · 11-26-2007, 12:58 PM

slap a board in it, or you can solder the break in the board

11-22-2007, 11:32 PM	#1 (permalink)
Hood Scoop 2.4 Liter SIDI ECOTEC Join Date: Jan 2007 Location: Columbus, OH Drives: 2000 Camaro SS 2005 Rendezvous 2004 Rainier Posts: 137	New wiper motor or pulse board? On the '97 GMC Jimmy, for a few months now, windshield wipers would "stick" every once in a while. By stick I mean they would stop and a humming noise could be heard from the wiper motor. this would be a momentary thing and they would take off again. Yesterday, they stuck and stayed stuck. After a little tugging back and forth (and getting soaked) the arms "caught" and started again, only to wipe once and stop again with humming resumed. I was planning to replace the wiper motor tomorrow, but wanted another opinion to make sure this was motor and not pulse board. With the humming, I thought the motor was sticking and was done. But didn't know if a faulty pulse board would cause this problem. Any thoughts? Thanks! __________________ Craig My Driveway: 2000 Camaro SS 2005 Rendezvous CXL 2004 Rainier CXL

11-23-2007, 07:53 AM	#2 (permalink)
doh 6.2 Liter LS9 Supercharged V8 Join Date: Sep 2003 Location: N.W.Ontario Posts: 5,559	Re: New wiper motor or pulse board? The pulse board failing, is pretty common. But being a 97, I would go ahead and replace the whole motor.

11-23-2007, 10:47 AM	#3 (permalink)
tom3 6.0 Liter L76 V8 Join Date: Dec 2004 Posts: 2,123	Re: New wiper motor or pulse board? The board problem would probably be a loose connection at a solder joint, pretty easy to spot if so. If it all looks fine I'd replace the whole deal to be sure.

11-23-2007, 11:40 AM	#4 (permalink)
GMCSonoma GMI Staff Member Join Date: Sep 2004 Posts: 10,053	Re: New wiper motor or pulse board? Do a tap test with the head of a screwdriver & if it works again...the board... Likely the issue, I'd start there as they are not usually included with a motor... __________________ GM dealer parts manager...for a lot of years! *Please post all tech questions to the GMI Tech Forum, not my message box! Thanks*!

11-24-2007, 10:22 AM	#5 (permalink)
motorman 3.6 Liter SIDI V6 Join Date: Jan 2003 Posts: 1,133	Re: New wiper motor or pulse board? my 88 silverado wiper will not shut off sometimes and the washers do not work. what do i need to do to fix this ???? __________________ chevy owner since 1953,30 new chevys and 11 new corvettes since 1959 ,# 11 2008 corvette in the garage ,2004 impala,1988 2500 silverado,former NASCAR tech inspector,retired race engine builder

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11-24-2007, 11:04 AM	#7 (permalink)
Hood Scoop 2.4 Liter SIDI ECOTEC Join Date: Jan 2007 Location: Columbus, OH Drives: 2000 Camaro SS 2005 Rendezvous 2004 Rainier Posts: 137	Re: New wiper motor or pulse board? I just replaced both parts. Good as new! __________________ Craig My Driveway: 2000 Camaro SS 2005 Rendezvous CXL 2004 Rainier CXL

11-24-2007, 04:24 PM	#9 (permalink)
01cavalier 7.0 Liter LS7 V8 Join Date: Jul 2005 Location: Casa Grande, AZ Drives: 2007 Cobalt, 2001 Ford Ranger Posts: 4,810	Re: New wiper motor or pulse board? When I worked for customer service it was almost always the board, motor failures were uncommon, I dealt with a lot of these. At least it's an easy fix. __________________ No longer have the Cavalier, now it's a Cobalt!

11-25-2007, 11:03 AM	#10 (permalink)
slls 2.4 Liter SIDI ECOTEC Join Date: Jul 2004 Posts: 274	Re: New wiper motor or pulse board? It is a cheap fix, if you own a soldering gun and some solder.

11-26-2007, 12:58 PM	#11 (permalink)
Triple-X08 4.6 Liter Northstar V8 Join Date: Apr 2005 Location: Michigan Drives: 2009 Chevrolet Impala LT, 83 Camaro Z28 Posts: 1,751	Re: New wiper motor or pulse board? slap a board in it, or you can solder the break in the board __________________ ASE Master Certified Technican ASE Advanced level L1 Engine Performance Specialist GM MOE - 2007 bronze level current cars in garage- 09 Chevrolet Impala - daily driver 83 Camaro Z28

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