Intermittant Wiper Pulse Module!!??!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

86 Silver · 10-07-2011, 01:32 PM

1986 Silverado. When i got the truck, no wipers, or they rarely worked. So i learn about a pulse module, which i purchase a new one (AC Delco) and install...pretty easy. Wipers work right away as does the pulse feature. Rain storm...after 5-10 min they sieze up in the middle of the winow, move some more after a minute or so, move again a bit more, i shut them off...and 2 min later they go down.

so what do i think? bad new module.

so what do i do? buy a new module and send defective one back.

installed new module...wipers work right away. rain storm today, all functions work well. after about 5-10 min of driving and having wipers on...they sieze up in the vertical position. then after a minute or 2 they move to half way down...i shut them off...a minute to 2 later they go down.

seriously pissed right now. no, they will not repsond when they are acting like that to any setting at all.

wiring harness is relativel new on both ends. wiper motor is one year old. selector switch is relatively new.....i'm on my third module and dont know where to go!!!!!

notyo_cheez · 10-07-2011, 02:11 PM

That's a hard one. Maybe a short in the harness to the switch?

oily · 10-07-2011, 04:09 PM

Sounds like the module is getting too hot.

chevy_skills · 10-07-2011, 04:57 PM

I would trace the wires and make sure they haven't chaffed and have a short.

86 Silver · 10-07-2011, 11:13 PM

Quote:

Originally Posted by chevy_skills

I would trace the wires and make sure they haven't chaffed and have a short.

done that...all good.

**hatzie** · 10-08-2011, 08:44 AM

GM switches the ground to the wiper motor. Check the ground connection under the dash.
http://67-72chevytrucks.com/vboard/s...16&postcount=7

BLE 'BURBAN · 10-09-2011, 12:10 AM

Replace the wiper motor. It's on it's last leg and even that ones slippin on the edge of the grave.

86 Silver · 08-02-2012, 08:31 AM

Quote:

Originally Posted by BLE 'BURBAN

Replace the wiper motor. It's on it's last leg and even that ones slippin on the edge of the grave.

I would have told you that that is impossible. The wiper motor is only a few months old from O'Reilly's...but then i would have been wrong. It was a reman wiper motor so i took the new reman I had installed and got credit back for another reman...guess what? WORKING! sigh....

**1774btcrew** · 08-02-2012, 04:06 PM

From my experience with O'Reilley's remanufactured electrical stuff it is sketchy at best. I but a lifetime warranty starter from them and replaced 4 in 2 months. What good is a warranty if you have to spend all of your time replacing something? I use NAPA parts or I have a really good electrical motor repair place that has been in business since the 1960's that I fully trust. You just never know who is rebuilding this stuff and the quality of parts that is being used!

86 Silver · 02-23-2013, 03:29 PM

It was the crappy reman Oreilly's wiper motor. Once I replaced it...again...it worked just fine.

10-07-2011, 01:32 PM	#1
86 Silver Registered User Join Date: Jun 2011 Location: Minot, ND Posts: 36	Intermittant Wiper Pulse Module!!??!! 1986 Silverado. When i got the truck, no wipers, or they rarely worked. So i learn about a pulse module, which i purchase a new one (AC Delco) and install...pretty easy. Wipers work right away as does the pulse feature. Rain storm...after 5-10 min they sieze up in the middle of the winow, move some more after a minute or so, move again a bit more, i shut them off...and 2 min later they go down. so what do i think? bad new module. so what do i do? buy a new module and send defective one back. installed new module...wipers work right away. rain storm today, all functions work well. after about 5-10 min of driving and having wipers on...they sieze up in the vertical position. then after a minute or 2 they move to half way down...i shut them off...a minute to 2 later they go down. seriously pissed right now. no, they will not repsond when they are acting like that to any setting at all. wiring harness is relativel new on both ends. wiper motor is one year old. selector switch is relatively new.....i'm on my third module and dont know where to go!!!!!

10-07-2011, 02:11 PM	#2
notyo_cheez Registered User Join Date: Apr 2011 Location: corpus christi, tx - america's fattest city Posts: 253	Re: Intermittant Wiper Pulse Module!!??!! That's a hard one. Maybe a short in the harness to the switch?

10-07-2011, 04:09 PM	#3
oily Registered User Join Date: Oct 2010 Location: Vancouver BC Posts: 57	Re: Intermittant Wiper Pulse Module!!??!! Sounds like the module is getting too hot.

10-07-2011, 04:57 PM	#4
chevy_skills Registered User Join Date: Sep 2011 Location: fort walton beach Posts: 34	Re: Intermittant Wiper Pulse Module!!??!! I would trace the wires and make sure they haven't chaffed and have a short.

10-08-2011, 08:44 AM	#6
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,968	Re: Intermittant Wiper Pulse Module!!??!! GM switches the ground to the wiper motor. Check the ground connection under the dash. http://67-72chevytrucks.com/vboard/s...16&postcount=7

10-09-2011, 12:10 AM	#7
BLE 'BURBAN In the Forgotten far North. Join Date: Jul 2007 Location: Anchorage, Alaska Posts: 2,627	Re: Intermittant Wiper Pulse Module!!??!! Replace the wiper motor. It's on it's last leg and even that ones slippin on the edge of the grave. __________________ 1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade

08-02-2012, 04:06 PM	#9
1774btcrew Senior Member Join Date: Jun 2009 Location: Phoenix AZ Posts: 4,584	Re: Intermittant Wiper Pulse Module!!??!! From my experience with O'Reilley's remanufactured electrical stuff it is sketchy at best. I but a lifetime warranty starter from them and replaced 4 in 2 months. What good is a warranty if you have to spend all of your time replacing something? I use NAPA parts or I have a really good electrical motor repair place that has been in business since the 1960's that I fully trust. You just never know who is rebuilding this stuff and the quality of parts that is being used!

02-23-2013, 03:29 PM	#10
86 Silver Registered User Join Date: Jun 2011 Location: Minot, ND Posts: 36	Solved It was the crappy reman Oreilly's wiper motor. Once I replaced it...again...it worked just fine.



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