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- - whipper motor (https://67-72chevytrucks.com/vboard/showthread.php?t=757099)

Hi Folks I rescued a whipper motor out of a 66 c 10 and before I damage it can someone tell me what terminals to use to test its function

Re: whipper motor

how many terminals on your motor?

Re: whipper motor

Both the 3 and 4 terminal wiper motors have one terminal that's spaced a bit farther away from the others. That one is the "low" speed terminal.

The next terminal over (after the gap / space) is the "high" speed terminal. Right next to that is the "+12V power" terminal. And if there's a 4th terminal, that is also a "+12V power" terminal that (along with a short jumper wire) feeds power to the washer pump solenoid.

The washer pump solenoid will have 2 terminals that point off in a different direction than the other 3 or 4 motor terminals.

The "+12V power" terminal is wired directly to the "wiper" fuse in the fuse box that is live whenever the key is on. The dash switch grounds both the "low" and "high" motor terminals to run the wipers on low speed. The switch only grounds the "high" motor terminal to run the wipers on high speed. There is also a ground strap (bridging over one of the rubber motor mounting grommets) to provide a case ground that is used by the motor's internal park switch. That park switch allows the motor to continue running until the wipers park at the base of the windshield if the dash switch is turned off mid-swipe.

Re: whipper motor

So if a person just wanted to have low speed on a toggle switch how would he wire that? I am just building my dash with rocker switches or toggle. Sort of a rat rod thing

Re: whipper motor

Quote:

Originally Posted by hotrodder (Post 8188288)

So if a person just wanted to have low speed on a toggle switch how would he wire that? I am just building my dash with rocker switches or toggle. Sort of a rat rod thing

You would want to run the +12V feed wire from the fuse box to the "power" terminal on the wiper motor (just like the stock configuration). Then connect both the "high" and "low" terminals on the motor to one terminal of a SPST (single pole, single throw) toggle switch. Finally, connect the other terminal of the toggle switch to a good ground. This will give you low speed only. And as long as the motor has a good case ground and it's internal parking switch is functional, it will also retain the auto parking feature.

Re: whipper motor

Thank you for the information.