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Need help wiring wiper motor.

handloader90

handloader90

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I'm wiring my wiper motor as a stand alone unit.

The truck is a '76 K10 and has the squared off wiper motor with a canister looking thing on the bottom.

It will receive power via a remote fuse block with the correct amp fuse (25A I believe) and will be controlled with a SPDT toggle switch (ON-OFF-ON). No relay is being used since the toggle is rated at 30A or 50A (forgot which one).

I have the new wiper motor installed and just need help wiring it up.

I have 3 terminals on the switch and 3 terminals on the wiper motor. I would just keep swapping wires around to see what worked but I don't want to fry the wiper motor.

Just looking for help on which terminal I hook the hot wire to and from there where each wire goes from the switch terminals to the wiper motor terminals and if I need to run any grounds. I know the wiper motor is already grounded via a brass strip.

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Guess I'll throw it on the bench and test some different wire setups out until I get it right. I'll post my findings here for the next person to have guidance from.
 
The center is power from fuse panel. Other 2 are grounds from the original switch to control high an low. When the switch is off the grounds are removed. Power Is hot to the motor when key is on via the center wire.
 
Thank you! So can I run a a hot wire from "2ND" fuse block straight to the center terminal on the wiper motor?

Since its always grounded unless the wipers are being used I don't run the risk of drawing from the battery do I?
 
For wipers to work put power to the motor on the center and ground to the left terminal. Put that switch in which ever wire you choose.
Probably center and one outer on that switch to break power.

That will get you wipers but only one speed.

Get an cheap meter and learn how to use it, they work wonders.
 
It's not always grounded unless the original switch is on. The brass tab does nothing unless u provide a ground to the terminals. Lt and rt terminals are grounds
 
Right. So hot to the middle terminal, ground to left terminal and ground to right terminal.

Will I have to worry about it drawing anything from the battery with this setup say when the truck is off?

Also how does the wiring from the toggle work? Ground to sheetmetal for middle terminal for off and the other two are grounded to the left and right terminals of the wiper motor, correct?
 
Put a wire to the Left term to a ground point. Put the switch in the power wire to the center term from ign hot fuse panel to control on and off
 
Don't put the ground on the right terminal just the left. The switch u have acts just like u cut the power wire with cutters.

Power from fuse panel to center term of new switch. From either of the two outer terms run the wire to center term of the motor.

The switch cuts the power to the wipers.
 
Yeah I figured , I'm not the best at explaining sometimes

ground the left terminal to any ground



Power wire from fuse panel thru the switch to the motor center terminal will give you wipers . The switch cuts the power source from the fuse panel.



Just trying to get you some wipers. Nothing fancy
 
You should have high now. Try adding another ground on the right term and see if they slow down.
Because of the way it was wired originally resistance thru switch and motor controls the speed.
 
If that doesn't work try swapping back an forth between left and rt grounds. See what happens
 
Didn't do anything.

I did hook up another wire from the unused terminal on the switch to the unused terminal on the wiper motor and it went slow but in reverse about an inch or so and then just stopped.

No worries brother. I appreciate the help! Now I can drive in the rain lol.
 
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