Default Wiring issue with wipers...maybe 

Old 10-18-2019, 05:51 PM   #1
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I have a 1979 CJ7 with a 304 and 4 speed manual. The wiper motor is a 3 wire. The original switch was missing and all that was left hanging under the dash was the switch portion that the wires plug into. I bought a new switch , plugged it in and nothing happens. I removed the dash pad and looked at the motor and traced the 3 wires back and they are intact. How does the wiper motor actually get power? I have not removed it but all I see are the 3 wires coming out of it that plug into the switch. Obviously it is never going to have power as Those 3 wires only communicate to the switch. I have looked at the wiring diagram and it only shows those three wires and I know motors do not run on magic. Could someone explain what other wire(s) should be present because I have a feeling this thing is missing a wire somewhere. Also the new switch has 5 prongs on it and the plug from the motor only uses three of them. Thank you for any help you can provide.

 

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Default Re: Wiring issue with wipers...maybe 

Old 10-18-2019, 06:41 PM   #2
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I think the switch is grounded by mounting on the dash plate. Is it in the dash or hanging?

And I'll check my wiring diagram too.
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Default Re: Wiring issue with wipers...maybe 

Old 10-18-2019, 06:49 PM   #3
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Ok, it's the motor being mounted that provides the ground and all I see are the same three wires - black, red, green, and I have no idea where the power comes from either.
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Default Wiring issue with wipers...maybe 

Old 10-19-2019, 12:09 AM   #4
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3 wires to the motor, 1 wire supplies power to the switch, and one wire to the windshield washer

Sent from my iPhone using Tapatalk

Last edited by GRR; 10-19-2019 at 12:14 AM..

 

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Default Re: Wiring issue with wipers...maybe 

Old 10-19-2019, 12:41 AM   #5
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This one shows the wires from the wiper motor


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Default Re: Wiring issue with wipers...maybe 

Old 10-21-2019, 01:49 PM   #6
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Thank you to everyone! Definitely a lifesaver! I need to replace the linkage in the windshield and I am going to go ahead and get a new motor in case this one does not work. I would rather have a spare on hand then not have one if needed.

 

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