The Stovebolt Site Forums The Shop Area The Electrical Bay 58 gmc wiper motor

Anyone got a picture of the wiper motor and arms on a 58 gmc. I've got an electric wiper motor on my truck with 4 or 5 wires coming out of it. It's never been hooked up and I'm not even sure it's the right one. So does anyone have a picture they can show me of the right one and how the arms hook up. thanks. Larry

see the manual [and following pages], what you have is wrong, an original electric wiper motor was the same as the TF Chevy, only wire is one hot lead, control was a cable that moved the mechanical switch on the motor unit .... likely yours isn't hooked up cuz whoever put it in couldn't figure it out or maybe you have an aftermarket one for Chev, which might be adapted

Bill

5 wires, you may have a fancy donor or aftermarket with possibly: Hi (wht), Lo (yel), Park (blu), Batt (red) and ground (grn or blk). If it's made for your transmission arms, they will attach with a spring loaded clip. Bill's PP 150, fig 36. (go back one sheet from his link). Your aftermarket should have the wires coming out of the motor and attaching to the switch. A little playing with continuity of the switch will tell you what terminals control what functions...or it may be marked. Fuse it and hook it up.

Bartamos, you may be right with your color code. I'll get me a 3 pos switch and try it. It only has one crank end on it to attach a wiper arm that I can see, while standing on my head. I need to put my camera up there and take some better pictures. Larry

You may want to take all arms and motor and go to the bench and get it all working with mockup, with blades. Figure all the little problems out, attachments and sweep angles. Then assemble into truck. Much easier in the long run. A little plywood with some holes and you are there. Use a battery charger.

I pulled the wiper motor and the remaining arm out.

Wiper is an American Bosch 12K 2799 also WWC 12K 785 and then B12 17 71 which I figure is the date it was made.

It only has 3 wires, Red Black Green. The Green goes one rev and stops. If I hook that the grn and black together it will make one rev and stop. The red keeps going. The Black by itself will keep going. The way I tested it using a battery charger with the negative lead to ground on motor and using the Red charger to see what each lead did. Any ideas are greatly appreciated, what kind of switch and where to get power, ACC? Thanks Larry

can't say for sure, but usually the motor is insulated from ground by rubber mountings, I think black would be ground .... one rev only would likely be park, you may have a single speed motor

Bill

The motor was mounted on a homemade mount so who knows. Does anyone have a pic of what is should look like. Larry

an original is shown in various pics in the manual I linked above

Bill

Thanks Bill, I see it now. Larry

EDIT....Your Bosch is used by early jeeps. It will need the proper sweep, proper park and proper arm attachment to work.
If I were you, I would sell it and get a original donor or aftermarket direct fit from our vendors. Too important and too much jury rigging going on. Ebay has transmission arms and motors all the time. I believe switching from Vacuum to electric means different transmission arms, if that's you. I did find how to wire red grn blk on web but I don't trust it. It is said to be a two speed motor. If you want to chance it, I will post.

I keep looking at it and thinking it's a lot of work for what it is. I may just do that..Larry