Wiper motor is getting power but wipers won’t work. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

andrewpclayton · 11-30-2017, 02:56 AM

New motor? New link assembly?

andrewpclayton · 11-30-2017, 02:56 AM

Actually having same problem with the heater blower motor as well.

Barnfind46 · 11-30-2017, 08:38 AM

Because you have two things not working I would start with the wipers. Check all the fuses,then the grounds.Then make sure the contacts in the plug are clean with no corrosion.If still no good,check the wiring diagram to find which terminal is power on the wiper motor and run a jumper wire from a 12 volt battery. If the motor runs it will be the switch.If this fixes the wipers but the blower motor still does not work,I would do the same with the blower motor. Hope this helps.

Wrenchbender Ret · 11-30-2017, 10:34 AM

The wiper motor is grounded through the switch. If you have power to it try jumping the wire to the switch to ground. If the motor gos the problem is in the switch. Trace the heater wire with a test light. It should have current going to it when the ign. is turned on & the heater switch turned on.
George

**LockDoc** · 11-30-2017, 11:35 AM

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I would check the ground straps from the engine and the frame, to the cab first to make sure the cab is grounded good. If you don't find any ground straps add some. Read the thread "Testing Windshield Wiper Motors" that is down below this one a ways.

LockDoc

andrewpclayton · 01-02-2018, 10:10 PM

the entire unit was getting power, and i found that the wipers work if i help them along sometimes with a little force. I used a whole lot of WD-40 on every connection on the linkage and that seemed to work. they have been working the last 6 times i have tried and they seem to be moving pretty well. thanks!

custom10nut · 01-02-2018, 10:43 PM

Grounds and continuity are the secrets to success with these trucks. Make sure all your grounds are making contact and put dielectric grease on all your contacts

custom10nut · 01-02-2018, 11:01 PM

Grounds and continuity are the secrets to success with these trucks. Make sure all your grounds are making contact and put dielectric grease on all your contacts

11-30-2017, 02:56 AM	#1
andrewpclayton Registered User Join Date: Aug 2017 Location: Eugene Oregon Posts: 128	Wiper motor is getting power but wipers won’t work. New motor? New link assembly? __________________ 1977 SWB (c20 conversion) SBC350 Springfield Oregon Instagram: @nevernotchevy

11-30-2017, 02:56 AM	#2
andrewpclayton Registered User Join Date: Aug 2017 Location: Eugene Oregon Posts: 128	Re: Wiper motor is getting power but wipers won’t work. Actually having same problem with the heater blower motor as well. __________________ 1977 SWB (c20 conversion) SBC350 Springfield Oregon Instagram: @nevernotchevy

11-30-2017, 08:38 AM	#3
Barnfind46 Registered User Join Date: Aug 2014 Location: Mena,Arkansas Posts: 485	Re: Wiper motor is getting power but wipers won’t work. Because you have two things not working I would start with the wipers. Check all the fuses,then the grounds.Then make sure the contacts in the plug are clean with no corrosion.If still no good,check the wiring diagram to find which terminal is power on the wiper motor and run a jumper wire from a 12 volt battery. If the motor runs it will be the switch.If this fixes the wipers but the blower motor still does not work,I would do the same with the blower motor. Hope this helps.

11-30-2017, 10:34 AM	#4
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,203	Re: Wiper motor is getting power but wipers won’t work. The wiper motor is grounded through the switch. If you have power to it try jumping the wire to the switch to ground. If the motor gos the problem is in the switch. Trace the heater wire with a test light. It should have current going to it when the ign. is turned on & the heater switch turned on. George

11-30-2017, 11:35 AM	#5
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,388	Re: Wiper motor is getting power but wipers won’t work. - I would check the ground straps from the engine and the frame, to the cab first to make sure the cab is grounded good. If you don't find any ground straps add some. Read the thread "Testing Windshield Wiper Motors" that is down below this one a ways. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

01-02-2018, 10:10 PM	#6
andrewpclayton Registered User Join Date: Aug 2017 Location: Eugene Oregon Posts: 128	Re: Wiper motor is getting power but wipers won’t work. the entire unit was getting power, and i found that the wipers work if i help them along sometimes with a little force. I used a whole lot of WD-40 on every connection on the linkage and that seemed to work. they have been working the last 6 times i have tried and they seem to be moving pretty well. thanks! __________________ 1977 SWB (c20 conversion) SBC350 Springfield Oregon Instagram: @nevernotchevy

01-02-2018, 10:43 PM	#7
custom10nut Registered User Join Date: Apr 2015 Location: East Tn (In the heart of the Smoky Mtns) Posts: 1,858	Re: Wiper motor is getting power but wipers won’t work. Grounds and continuity are the secrets to success with these trucks. Make sure all your grounds are making contact and put dielectric grease on all your contacts

01-02-2018, 11:01 PM	#8
custom10nut Registered User Join Date: Apr 2015 Location: East Tn (In the heart of the Smoky Mtns) Posts: 1,858	Re: Wiper motor is getting power but wipers won’t work. Grounds and continuity are the secrets to success with these trucks. Make sure all your grounds are making contact and put dielectric grease on all your contacts



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