1 more wiring question - Wiper Motor - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**CPNE** · 04-13-2004, 10:52 AM

Thanks to all that helped with horn and brake lights. Here is the last wiring ? (hopefully).

My wiper motor does not turn on in either slow or fast postion. It will turn on when the knob is pressed for the washer pump. I have tried another switch and it behaves the same. Am I lloking at replacing the motor? Or what else should I test?

Thanks

JimKshortstep4x4 · 04-13-2004, 11:15 AM

Good one Jeff!

The motor is good, otherwise it would not run. Since the windshield wiper switch "grounds" the motor to make it run and the washer circuit is different, I would check the switch to make sure it is grounded.

As a check you can use a ground wire to go direct to the motor which would bypass the switch and wiring.

Jim

**CPNE** · 04-13-2004, 11:21 AM

Jim, your knowledge is unsurpassed. Are you sure you weren't a GM engineer in a former life? Thanks (once again), I feel humbled.

04-13-2004, 10:52 AM	#1
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,662	1 more wiring question - Wiper Motor Thanks to all that helped with horn and brake lights. Here is the last wiring ? (hopefully). My wiper motor does not turn on in either slow or fast postion. It will turn on when the knob is pressed for the washer pump. I have tried another switch and it behaves the same. Am I lloking at replacing the motor? Or what else should I test? Thanks __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

04-13-2004, 11:21 AM	#3
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,662	Jim, your knowledge is unsurpassed. Are you sure you weren't a GM engineer in a former life? Thanks (once again), I feel humbled. __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

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04-13-2004, 11:15 AM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Good one Jeff! The motor is good, otherwise it would not run. Since the windshield wiper switch "grounds" the motor to make it run and the washer circuit is different, I would check the switch to make sure it is grounded. As a check you can use a ground wire to go direct to the motor which would bypass the switch and wiring. Jim



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