Wiper switch hookup

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Old Nov 18, 2017 | 09:39 AM
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drkearnel's Avatar
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Wiper switch hookup

When I picked up my 64 Cutlass it didn’t have he wiper switch installed, I have now found the switch in a box of “extras” tha came with.

Issue is I’m not sure which wire goes where. I’ve attached a pic of the wires and switch if anyone can help.

I think this is a 2 speed switch? From what I can comprehend from wiring diagram and how the motor is hooked up, the white wire is the washer motor and the green and purple are for wipers

any help would be great!




Old Nov 18, 2017 | 10:04 AM
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Going off the wiring diagram. The green is the wiper, the white is the washer feed from the switch. The purple is fed from the fuse box to the wiper motor, and jumpers to the washer. The single terminal on the switch should connect to the metal of the switch body when the washer is engaged and there should be a ground wire terminal in the 2 wire plug. The schematic shows a single speed wiper motor. Don't know about the black wire, possibly the heater.

http://circuitswiring.com/circuit-di...-85-part-2.jpg

http://www.oldcarmanualproject.com/t...re5765-288.jpg
Old Nov 18, 2017 | 11:11 AM
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Originally Posted by oldcutlass
The single terminal on the switch should connect to the metal of the switch body when the washer is engaged and there should be a ground wire terminal in the 2 wire plug.
These switches are supposed have a ground wire? I thought they were grounded by the body when screwed in?

Which wire goes to which terminal on the switch?

the purple/black wire runs from the wiper motor through the firewall and is just loose with the green and white ones.
Old Nov 18, 2017 | 11:33 AM
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Originally Posted by drkearnel
These switches are supposed have a ground wire? I thought they were grounded by the body when screwed in?
Yes... Like Eric said. The wiper motor and the washer pump are fed with a constant hot. When the switch for either the wipers or the washers is engaged, a ground signal is sent to the respective motors.
Old Nov 18, 2017 | 01:00 PM
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Originally Posted by drkearnel
These switches are supposed have a ground wire? I thought they were grounded by the body when screwed in?
It looks like the single terminal is grounded to the body of the switch. According to the diagram the side by side connector should have a ground wire in it.

Which wire goes to which terminal on the switch?
The white wire goes to the single terminal and the green in the side by side connector connects to the other 2.

the purple/black wire runs from the wiper motor through the firewall and is just loose with the green and white ones.
Your going to have to verify that the purple/blk wire is in fact the one that goes to the motor. It should be hard wired in the fuse box.
Old Nov 21, 2017 | 09:37 AM
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Thanks for getting back. I'll double check on the purple/black wire when I get home and update.

Originally Posted by oldcutlass
Your going to have to verify that the purple/blk wire is in fact the one that goes to the motor. It should be hard wired in the fuse box.
Old Nov 21, 2017 | 10:06 AM
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Which wiper motor do you have - square or round?
Old Nov 21, 2017 | 12:45 PM
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Originally Posted by joe_padavano
Which wiper motor do you have - square or round?
I honestly am not sure. It looks like a normal wiper motor to me haha It looks like this one below, if that helps.

Old Nov 21, 2017 | 01:08 PM
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Originally Posted by drkearnel
I honestly am not sure. It looks like a normal wiper motor to me haha It looks like this one below, if that helps.

That is round. This is square:

Old Nov 21, 2017 | 01:15 PM
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Originally Posted by joe_padavano
That is round. This is square:



Interesting, I'm new to the Olds scene, so that's news to me.

Yes I have the round wiper motor.
Old Nov 21, 2017 | 07:23 PM
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Originally Posted by oldcutlass
Your going to have to verify that the purple/blk wire is in fact the one that goes to the motor. It should be hard wired in the fuse box.
so I can confirm the purple/black wire goes from the wiper motor, through the firewall, and is hanging under the dash with the other wires right inside the wiper switch location.

the motor has the purple/black, a solid purple, and dark green

the washer pump has yellow and solid purple jumped from wiper motor.

crappy pic attached
Old Nov 28, 2017 | 04:39 AM
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So it looks like I have a third wire to the switch and motor that is not shownin the diagram.

Is is this because I have 2 speed wipers?
Old Dec 8, 2017 | 03:31 AM
  #13  
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How would I bench test the wiper switch to make sure it is not at fault?
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