Help with pulse wipers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DBLSPRT68 · 04-11-2005, 09:54 PM

Hello all, I've been working on my truck the past few weeks to get ready for the trip I just got back from (8hrs down empty with trailer- 10hrs back loaded to the gills and a 65 bel air!). Last week I checked my wipers and all worked well. I turned on my wipers the other day and only have high speed! I have an 83 with pulse type switch mounted on the dash. Any ideas? Why is it working in high speed only??

Hope someone can help. David

PhilaTruck · 04-11-2005, 10:43 PM

Mine do(es) the same thing. Only not all of the time. I've pryed the switch apart & cleaned up all of the surfaces. No change. The I pulled it apart again and carefully lubed it with copper grease. Okay, it's better but still a little funny. Try cleaning it up, it may improve it, but if my epxerience is typical, you'll end up getting a new one eventually. I'm hoping someone tells me I'm wrong & posts a solution. Good luck w/ the switch but more importantly, good luck with the bel air.

86-C10-V6 · 04-13-2005, 08:57 PM

I am not familiar with the 83 but the 86 model has a wiper module located under the dash, attached to the steering column.
I think the high speed wiper switch setting, bypasses the pulse controller.
My controller had broken solder joints on the main transistor that is used to pulse the wiper motor, touched it up with a soldering iron and no more problems.
Good luck.

DBLSPRT68 · 04-14-2005, 02:35 AM

Thanks for the info Hacksaw. My switch is on the dash, but more likely is the same principle. I'll have to check into cleaning the switch or getting a new one. I was also thinking that high speed bypassed everything, so that sounds like the pulse/intermit part of my switch is bad. I'll post later if I find out what it is. David

Esteban86K5 · 04-14-2005, 04:02 AM

I think hacksaw may be talking about this.

If so, I just ripped it out of my truck and you can have it for $10 plus shipping if you want.

85gmcguy · 04-15-2005, 01:42 PM

Not to hijack anybody's thread or anything, but you guys might have accidentally answered my question.... I installed a tilt column from a truck with cruise and intermittent wipers into my 85 GMC which didn't come with those options. Everything works OK except the wipers, they only work on low no matter where the switch is, I'm guessing now that I may need one of those modules. Well, off to the junk yard

Gary

DBLSPRT68 · 04-18-2005, 07:17 PM

Quote:

Originally Posted by Esteban86K5

I think hacksaw may be talking about this.

If so, I just ripped it out of my truck and you can have it for $10 plus shipping if you want.

Hey Esteban86k5 is that from an 83? Do you know if it will work in my 83? I haven't had time to look, but give me a day or two so I can look. Thanks, David

bagged74 · 04-18-2005, 09:22 PM

I believe if the switch is on the dash, the module is a little different.

ElGracho · 04-18-2005, 09:55 PM

That box isn't the pulse wiper module. The wiper module has an aluminum heatsink on one side and looks like this:

I think the box above is for cruise control.

Esteban86K5 · 04-18-2005, 11:06 PM

El Gracho is correct. The box I posted above is for CC. I have the other one for the wipers too if you want it. I'll get a pic of it for you.

04-11-2005, 09:54 PM	#1
DBLSPRT68 Registered User Join Date: Nov 2000 Location: Ft. Mill, SC USA Posts: 931	Help with pulse wipers Hello all, I've been working on my truck the past few weeks to get ready for the trip I just got back from (8hrs down empty with trailer- 10hrs back loaded to the gills and a 65 bel air!). Last week I checked my wipers and all worked well. I turned on my wipers the other day and only have high speed! I have an 83 with pulse type switch mounted on the dash. Any ideas? Why is it working in high speed only?? Hope someone can help. David __________________ PROJECT TRUCK: 1985 SWB C10 Silverado Black/Charcoal, 1990 V2500 Suburban, 2018 Suburban, 2005 GMC 2500HD CCSB, 2014 Toyota Camry SE, HAD.....1968 Camaro RS/SS Family owned since new; 350 3 speed SOLD

04-11-2005, 10:43 PM	#2
PhilaTruck Right on the line, baby! Join Date: Oct 2003 Location: Phila, PA 19130 Posts: 1,486	Good question Mine do(es) the same thing. Only not all of the time. I've pryed the switch apart & cleaned up all of the surfaces. No change. The I pulled it apart again and carefully lubed it with copper grease. Okay, it's better but still a little funny. Try cleaning it up, it may improve it, but if my epxerience is typical, you'll end up getting a new one eventually. I'm hoping someone tells me I'm wrong & posts a solution. Good luck w/ the switch but more importantly, good luck with the bel air. __________________ 83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly Click and scroll down for site vendors! Subscribe here!

04-13-2005, 08:57 PM	#3
86-C10-V6 Shadetree Mechanic Join Date: Oct 2002 Location: Youngsville, NC Posts: 100	Most likely the Pulse controller under the dash I am not familiar with the 83 but the 86 model has a wiper module located under the dash, attached to the steering column. I think the high speed wiper switch setting, bypasses the pulse controller. My controller had broken solder joints on the main transistor that is used to pulse the wiper motor, touched it up with a soldering iron and no more problems. Good luck. __________________ Dave M. (Hacksaw) 86 C10 Scottsdale LWB, 4.3L, Edelbrock 1904, K&N, 700R4, 3.08 Auburn Performance 89 GMC S-15 Extended Cab 4x4, 4.3L, FI 98 K1500 Xcab, 5.7L, 3.43 Gov-Lok

04-14-2005, 02:35 AM	#4
DBLSPRT68 Registered User Join Date: Nov 2000 Location: Ft. Mill, SC USA Posts: 931	Thanks for the info Hacksaw. My switch is on the dash, but more likely is the same principle. I'll have to check into cleaning the switch or getting a new one. I was also thinking that high speed bypassed everything, so that sounds like the pulse/intermit part of my switch is bad. I'll post later if I find out what it is. David __________________ PROJECT TRUCK: 1985 SWB C10 Silverado Black/Charcoal, 1990 V2500 Suburban, 2018 Suburban, 2005 GMC 2500HD CCSB, 2014 Toyota Camry SE, HAD.....1968 Camaro RS/SS Family owned since new; 350 3 speed SOLD

04-14-2005, 04:02 AM	#5
Esteban86K5 Registered User Join Date: Oct 2003 Location: Bakersfield Posts: 133	I think hacksaw may be talking about this. If so, I just ripped it out of my truck and you can have it for $10 plus shipping if you want. __________________ Be American Buy American My Pics

04-15-2005, 01:42 PM	#6
85gmcguy Plays with trucks Join Date: Sep 2003 Location: Asheville, NC Posts: 433	Not to hijack anybody's thread or anything, but you guys might have accidentally answered my question.... I installed a tilt column from a truck with cruise and intermittent wipers into my 85 GMC which didn't come with those options. Everything works OK except the wipers, they only work on low no matter where the switch is, I'm guessing now that I may need one of those modules. Well, off to the junk yard Gary

04-18-2005, 09:22 PM	#8
bagged74 its just $$$$$ Join Date: Jul 2003 Location: OK Posts: 2,078	I believe if the switch is on the dash, the module is a little different.

04-18-2005, 09:55 PM	#9
ElGracho Gentleman Jim Driver Join Date: Nov 2002 Location: Poulsbo, WA Posts: 1,553	That box isn't the pulse wiper module. The wiper module has an aluminum heatsink on one side and looks like this: I think the box above is for cruise control. __________________ Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed Last edited by ElGracho; 04-18-2005 at 09:56 PM.

04-18-2005, 11:06 PM	#10
Esteban86K5 Registered User Join Date: Oct 2003 Location: Bakersfield Posts: 133	El Gracho is correct. The box I posted above is for CC. I have the other one for the wipers too if you want it. I'll get a pic of it for you. __________________ Be American Buy American My Pics



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