1986 Wiper Motor Ground - The 1947 - Present Chevrolet & GMC Truck Message Board Network

11555wally · 11-13-2015, 10:32 AM

My 86 C10 wiper motor does not park in correct location. I have read several posts on this site and it seems the most likely culprit is poor ground. It is mentioned that there is a ground strap, but mine doesn't have one that I can see. The motor is mounted with bolts going into the firewall with rubber spacers on them. How is the motor supposed to be grounded? Thanks in advance for any advice.

chrismoore701 · 11-13-2015, 11:31 AM

Try to ground the motor case with a jumper wire. if this works there ya go. From what I understand, one of the rubber grommets are lined with a ground connection.

good luck

11555wally · 11-13-2015, 12:02 PM

I ran a jumper from the motor case to the battery ground and it still stops where it wants. I'll keep checking previous posts. Thanks

chrismoore701 · 11-13-2015, 02:19 PM

Do you have your switch grounded? Check out my posts below, it shows how to test

http://67-72chevytrucks.com/vboard/s...d.php?t=688229

11555wally · 11-13-2015, 03:03 PM

My wiper switch is in the column with the turn signal lever. This acted this way when I first got the truck and I have since replaced the column with a rebuilt tilt column and new wiper switch and it still does it.

**hatzie** · 11-13-2015, 04:17 PM

The wiper motor park function is controlled inside the motor itself by the park switch. If the wiper motor is properly grounded through the dash switch then the parking switch failed. It's inside the motor gearbox. You can repair the motor parking switch or buy a rebuilt wiper motor.

There's an extensive windshield wiper motor troubleshooting guide in the 1986 GM light truck service manual. It starts about halfway down PDF page 1277.

NASTY-LSX · 11-13-2015, 11:53 PM

same problem here

ZUKE · 10-17-2016, 07:31 PM

http://s7d9.scene7.com/is/content/GenuinePartsCompany/1232577pdf?$PDF$

This is a napa bulletin that might help

11-13-2015, 10:32 AM	#1
11555wally Registered User Join Date: Oct 2014 Location: Southern Michigan Posts: 85	1986 Wiper Motor Ground My 86 C10 wiper motor does not park in correct location. I have read several posts on this site and it seems the most likely culprit is poor ground. It is mentioned that there is a ground strap, but mine doesn't have one that I can see. The motor is mounted with bolts going into the firewall with rubber spacers on them. How is the motor supposed to be grounded? Thanks in advance for any advice.

11-13-2015, 11:31 AM	#2
chrismoore701 Registered User Join Date: Dec 2004 Location: Highland, IN Posts: 2,319	Re: 1986 Wiper Motor Ground Try to ground the motor case with a jumper wire. if this works there ya go. From what I understand, one of the rubber grommets are lined with a ground connection. good luck __________________ Chris _______________________________ 1979 Chevy Stepside SPORT 2018 Chevy Silverado, 39 years apart My build 2008-2016. http://m.imgur.com/a/bURrE

11-13-2015, 12:02 PM	#3
11555wally Registered User Join Date: Oct 2014 Location: Southern Michigan Posts: 85	Re: 1986 Wiper Motor Ground I ran a jumper from the motor case to the battery ground and it still stops where it wants. I'll keep checking previous posts. Thanks

11-13-2015, 02:19 PM	#4
chrismoore701 Registered User Join Date: Dec 2004 Location: Highland, IN Posts: 2,319	Re: 1986 Wiper Motor Ground Do you have your switch grounded? Check out my posts below, it shows how to test http://67-72chevytrucks.com/vboard/s...d.php?t=688229 __________________ Chris _______________________________ 1979 Chevy Stepside SPORT 2018 Chevy Silverado, 39 years apart My build 2008-2016. http://m.imgur.com/a/bURrE

11-13-2015, 03:03 PM	#5
11555wally Registered User Join Date: Oct 2014 Location: Southern Michigan Posts: 85	Re: 1986 Wiper Motor Ground My wiper switch is in the column with the turn signal lever. This acted this way when I first got the truck and I have since replaced the column with a rebuilt tilt column and new wiper switch and it still does it.

11-13-2015, 04:17 PM	#6
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,920	Re: 1986 Wiper Motor Ground The wiper motor park function is controlled inside the motor itself by the park switch. If the wiper motor is properly grounded through the dash switch then the parking switch failed. It's inside the motor gearbox. You can repair the motor parking switch or buy a rebuilt wiper motor. There's an extensive windshield wiper motor troubleshooting guide in the 1986 GM light truck service manual. It starts about halfway down PDF page 1277. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful. Last edited by hatzie; 10-17-2016 at 09:43 PM.

11-13-2015, 11:53 PM	#7
NASTY-LSX Registered User Join Date: Oct 2013 Location: HOUSTON Posts: 355	Re: 1986 Wiper Motor Ground same problem here

10-17-2016, 07:31 PM	#8
ZUKE Registered User Join Date: Nov 2014 Location: BILLERICA MASSACHUSETTS Posts: 15	Re: 1986 Wiper Motor Ground http://s7d9.scene7.com/is/content/GenuinePartsCompany/1232577pdf?$PDF$ This is a napa bulletin that might help



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