07-23-2010, 06:45 PM | #1 |
Registered User
Join Date: Aug 2009
Location: Tomball, TX
Posts: 578
|
Wiper Motor
I'm trying to troubleshoot my windshield wipers, they haven't worked as long as I've had the truck. So I'm thinking the motor's shot or the wiring is bad, I was gonna test the motor first. Do i just plug it into 12v from the battery? Or does it need some kinda fuse? I'm not much of an electrician. Thanks for the help!
__________________
'68 C10 LWB 6.2NA/NP833 3.73's |
07-23-2010, 06:53 PM | #2 |
Registered User
Join Date: Apr 2010
Location: Moreno Valley
Posts: 74
|
Re: Wiper Motor
I would think just using a 12 volt battery would work. Give it a try
__________________
~~'71 GMC shortbed. Recently, 2007 Mazda 3 hatchback. |
07-23-2010, 06:55 PM | #3 |
Registered User
Join Date: Aug 2009
Location: Tomball, TX
Posts: 578
|
Re: Wiper Motor
ok thanks I'll see what happens
__________________
'68 C10 LWB 6.2NA/NP833 3.73's |
07-23-2010, 06:56 PM | #4 |
'70 C-10 Primer
Join Date: Dec 2008
Location: nevada,missouri
Posts: 117
|
Re: Wiper Motor
I just plugged mine to 12 volt and it ran. Some of them are 2 speed. So check the switch, that is what was wrong with mine.
__________________
"The difference between stupidity and genius is that genius has its limits." Albert Einstein |
07-23-2010, 07:01 PM | #5 |
The Older Generation
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,373
|
Re: Wiper Motor
-
There is a certain sequence you have to use to test them. I will see if I can find it. LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
07-23-2010, 07:11 PM | #6 |
The Older Generation
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,373
|
Re: Wiper Motor
Here it is...
Testing the wiper motor independent of the switch: The depressed park and non-depressed park 2-speed wiper motors can be bench tested independent of the dash switch by making the following connections: * Ground the wiper motor housing. * Connect a jumper wire from a +12V source to the #2 (Power) terminal on the wiper motor. It's the bottom terminal on the rectangular motor or the middle terminal on the round motor. * Connect a jumper wire from ground to the #1 (High) terminal on the wiper motor. It's the middle terminal on the rectangular motor or the bottom terminal on the round motor. This should operate the motor at high speed. * Leaving the above connections in place, add an additional jumper wire between the #1 (High) and #3 (Low) terminal. #3 is the top terminal on both the rectangular and round motors. This should operate the motor at low speed. * On the rectangular case motor, leave the jumper between terminals #1 and #3 but disconnect it from ground. That should cause the motor to run (at low speed) until it reaches its park position at which point it should stop. * On the round case motor, leave terminal #3 grounded but unhook the ground jumper from terminal #1. That should cause the motor to run (at low speed) until it reaches its park position at which point it should stop. If the motor operates normally in the above tests but not when installed on the vehicle then the probelm is most likely in the switch or maybe the wiring. Don't forget to check the fuse. The switch can be tested with an ohmmeter. If the motor stops immediately when switched off (doesn't return to park position), first check the motor's ground strap. Since the motor is mounted on rubber cushions, it's grounded via a copper strap attached under one of the mounting screws. This is the ground for the park switch so the parking feature won't operate if the ground strap is missing, dirty, or corroded. If the ground strap checks out okay but the motor still doesn't go into park then the problem is most likely a worn out or dirty park switch. The park switch is located inside the motor's gearbox so some disassembly is required to check/clean the switch. I recommend consulting a good repair manual for the motor disassembly procedure. LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
07-23-2010, 07:27 PM | #7 | |
Registered User
Join Date: Aug 2009
Location: Tomball, TX
Posts: 578
|
Re: Wiper Motor
Quote:
__________________
'68 C10 LWB 6.2NA/NP833 3.73's |
|
07-23-2010, 07:34 PM | #8 |
Registered User
Join Date: Apr 2000
Location: Bonne Terre, Mo
Posts: 3,005
|
Re: Wiper Motor
Jeez ...Never seen that test procedure before.. talking about detailed..Kudos LOCDOC
__________________
'69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629" |
07-24-2010, 12:59 AM | #9 |
Still plays with trucks
Join Date: Jul 2009
Location: Spokane, WA
Posts: 3,556
|
Re: Wiper Motor
Agreed. That was great info to share. Thank you very much LockDoc.
__________________
miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577 69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been 69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc 68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E 79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars |
07-24-2010, 04:58 PM | #10 |
The Older Generation
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,373
|
Re: Wiper Motor
-
No problem guys I have used it many times and it works great.... I made up a couple of jumper wires with spade terminals and/or alligator clips to make it easier. Just watch your fingers and other body parts when the arm starts rotating.. LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 07-24-2010 at 05:00 PM. |
07-25-2010, 04:59 PM | #11 |
Registered User
Join Date: Jul 2008
Location: Tracy Ca
Posts: 171
|
Re: Wiper Motor
That is good info. It should go to FAQ section.
|
07-25-2010, 05:45 PM | #12 |
The Older Generation
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,373
|
Re: Wiper Motor
Maybe I will make a new thread and title it "Testing Wiper Motors" so it will be easy to find in the FAQ.
LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
07-26-2010, 12:17 AM | #13 |
Registered User
Join Date: Aug 2009
Location: Tomball, TX
Posts: 578
|
Re: Wiper Motor
Thanks for the info, I tested it and it works fine.
__________________
'68 C10 LWB 6.2NA/NP833 3.73's |
08-02-2010, 10:47 PM | #14 |
Registered User
Join Date: Mar 2006
Location: Ridge, NY
Posts: 6
|
Re: Wiper Motor
I saw your other post with the custom switch, and guess that was the problem, but I had a similar problem. Mine was the original alternator was like a 34 amp and I was running MSD ignition, so basically when I updated to a 100 amp alternator the wipers started working. The stock set up in 1970 couldn't handle all the added upgrades that I made.
|
03-25-2020, 07:42 PM | #15 |
Registered User
Join Date: Jan 2014
Location: SoCal
Posts: 281
|
Re: Wiper Motor
|
Bookmarks |
|
|