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Old 06-25-2009, 06:31 PM
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JpX JpX is offline
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Wiper Motor pin outs

I have the 3 wire 75-80 wiper motor. The helms manual says yellow brown blu/? Does anyone know which ones go where on the top of the wiper motor.

The prongs are spaced like this when look at it from radiator.

|-| ____ |-| _ |-|

I blew a fuse already after getting wipers to move one swipe, I'm trying to wire the wiper motor into the 96 GMC wiring harness from my motor swap. I've found the ignition power and ground from the GMC. Not sure what to do about the hi and low wires since this wiper motor/truck didn't come with that option. I used the high wire for the first test, maybe thats why fuse blew....?

Anyone know if the Later model wiper motors are a direct replacement & fit the wiper arms (cog/lobe) of the older models? I've thought of getting a late model waggy's wiper motor with intermittent settings & swaping it out.

Any help would be appreciated.
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76 J10 383 Vortec (CSFI) GMC 5 spd NV4500 NP241 No Lift and no 4wd yet. tc is on driver pumpkin on pass Build Thread

Last edited by JpX : 06-25-2009 at 06:33 PM.
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Old 06-26-2009, 06:49 PM
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Anyone care to look under thier hood and let me know the colors of the wires on there 75-80 FSJ wiper motor?? It'd sure help take some guess work and fuse blowing out of the equation.
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76 J10 383 Vortec (CSFI) GMC 5 spd NV4500 NP241 No Lift and no 4wd yet. tc is on driver pumpkin on pass Build Thread
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Old 06-26-2009, 06:51 PM
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My 1980 motor has 4 wires, so I don't think I can help.
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Old 06-26-2009, 06:54 PM
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'79 they switched to a 4 wire pigtail motor...I don't have anything that old anymore or I'd check for you.
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Old 06-26-2009, 07:29 PM
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Tornado230 Tornado230 is offline
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The motors basically work the same way.
Years ago my father bought a burned-out J-truck (an '85).
I bought a '78 and used the inside wiring from that with the fuse block.
It was just a matter of changing the position of a few wires, and I was able to operate the "Ford" style motor with the switch from the "GM" style motor.
It was just a matter of following the wiring diagrams from both years. Even the washers worked.
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