Windshield wiper wiring - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ksbeatty · 11-28-2010, 05:39 PM

I have a 70 chevy wiring issue. The wiper motor does not match the diagrams or pistures I have seen. I have a single black wire, then a light blue and dk blue wire that all go back to the switch. The issue is the yellow wires go to the dk blue and light blue and not the black. Of course, I have a yellow wire that goes to the fuse block. When I turn on the truck the wipers move a little but they do not work. If I move the wipers to the windshield and turn the motor on the wipers go to the rest position and then still do not work. I try to test by grounding each of the blue and the light blue and still nothing happens.

Is it the motor? Or is it the wiring?

I have mixed and matched some parts from the 70 Chevy and a 69 GMC butI thought they were all supposed to be the same. The wiring harness and the motor I know go together.

Thanks for the help.

JimKshortstep4x4 · 11-28-2010, 07:38 PM

From your description, it sounds like the motor is bad. If you have power on the yellow wire and you ground the two speed connections then the motor should run. (This assumes that the motor ground ids ok).

Jim

**LockDoc** · 11-28-2010, 10:40 PM

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Might be something you can use here...

http://67-72chevytrucks.com/vboard/s...d.php?t=413551

LockDoc

11-28-2010, 05:39 PM	#1
ksbeatty Registered User Join Date: Mar 2006 Location: Kansas Posts: 300	Windshield wiper wiring I have a 70 chevy wiring issue. The wiper motor does not match the diagrams or pistures I have seen. I have a single black wire, then a light blue and dk blue wire that all go back to the switch. The issue is the yellow wires go to the dk blue and light blue and not the black. Of course, I have a yellow wire that goes to the fuse block. When I turn on the truck the wipers move a little but they do not work. If I move the wipers to the windshield and turn the motor on the wipers go to the rest position and then still do not work. I try to test by grounding each of the blue and the light blue and still nothing happens. Is it the motor? Or is it the wiring? I have mixed and matched some parts from the 70 Chevy and a 69 GMC butI thought they were all supposed to be the same. The wiring harness and the motor I know go together. Thanks for the help. __________________ 1969 GMC 3/4 Ton 4x4 2" Lift, A/C, PS, PB 383 Stroker, 700R4, 205, 4.10 GM Medium Bronze (Copper Poly) no new nick name yet. She is to pretty to be the Beater. http://67-72chevytrucks.com/vboard/s...d.php?t=241855

11-28-2010, 07:38 PM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: Windshield wiper wiring From your description, it sounds like the motor is bad. If you have power on the yellow wire and you ground the two speed connections then the motor should run. (This assumes that the motor ground ids ok). Jim __________________ 1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC

11-28-2010, 10:40 PM	#3
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,432	Re: Windshield wiper wiring - Might be something you can use here... http://67-72chevytrucks.com/vboard/s...d.php?t=413551 LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -



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