Mounting switch on wiper motor conversion

Ok guys and gals. Just about done with the rebuild. Just installed my two American Bosch wiper motors. Amazingly enough they work. However, they only have a single speed setting with a park position. They will work for now though. I am using a SPDT switch. The top position is on...the middle is off...and the bottom position is park.

I am trying to get some ideas on how to run the wiring without having wires running around to the side and then to a switch.

I was thinking about making a small bracket and mounting the switch on top by the motor on the driver's side. That would leave just the power wiring routing up the side to the top.


Does anyone have any better ideas? Any lessons learned?

Also, I have read on various searches on this site about putting in an inline fuse. 8 amp fuse seems that I recall.

Thanks

 

I mounted a rotary switch in the hole where the vac line used to come out of the dash on the left hand side. I ran power to the switch and then from there to a 4-pin jack that I mounted under the dash on the extreme left hand side near the parking brake handle. I used a jack there so I can pull the leads heading up to the motors off when I lower the front windshield. Another option is to get those Bosch style wiper motors that have the on/off switches built into the motor itself, then you eliminate the need for a dash switch. I have that kind on the M715, but I like the ones in the CJ5 better. It's easier switching both motors on at once from the dash.

I put the mating 4-pin plug onto the wiring that runs up to the motors. The wires I ran consisted of a ground (I don't trust just letting the body of the motors ground through their mounts), and 2 power wires (one for running the motors and one for parking the motors). So I only used 3 of the 4 pins of the jack. I ran the wires through some black plastic split loom so it looks good. Since I used a rotary switch and the motors share a single power wire for parking, I had to run the power through a rectifier so the motors would park correctly. I have info about that on my web site at http://home.comcast.net/~sday77 Just follow the links to the CJ5 sction on wipers for a diagram. If you keep the SPDT you won't need the rectifier but you'll have to use more wires since each motor will need a separate park and run feed.

If you want to use the SPDT switch I'd get one without a center off position. Seems like those motors are each about 4A each so an 8A fuse might be a little too close. Maybe go to 15A. Just check what the max draw is on the motors, add that up and than amp a little above that.

Stan

 

Glen, SPDT is "single pole, double throw." It's like 2 switches in one that are ganged together. Since there are (I'm assuming) 2 seperate motors involved (like I have on the CJ5), the "park" function gets a little tricky. If you try to "share" the power feeds to the motors, when you try to "park" them, you get a condition (the "feedback" you mention) where one motor parks, the other is still running and it makes the first motor start up again. Until they both "sync up" they won't stay parked. Hard to describe until you've seen it.

Anyway, that kind of switch would (if wired correctly) fix the "feedback" problem and eliminate the need for the rectifier I used. I had to use a rectifier since the standard rotary wiper switches available now are meant to be used with only 1 motor at a time. They used to make a rotary wiper switch that was designed for 2 motors but I've never been able to find one. I suppose the center off position of that SPDT switch would give you a way to completely shut the power off to the wipers once they were parked. Other wise you wouldn't really need that. But yes, strictly speaking, he doesn't need to use the SPDT to park the motors. He could run always-on 12V to them for that. But the way he's proposing to do it would result in running the least number of wires up the side of the windshield for the wipers.

Stan

 

I am not the wiring guru some of you are, but it seems to work correctly. I just wired the park side of the motors together on one side of the switch. Then wired the "on" side of both motors to the other on postion on the switch. Off of course has the power wire fed to it. They seem to work well. The switch has a 5 amp/15amp CB in it so I think I should be good. On works both motors and then I go through off to the other side to bring them both to park. Once parked back to off. If someone thinks I will burn up my motors prematurely do not hesitate to tell me. I am working by trial and error.

BTW

Thank you Stan for a pretty good site for us novices. I have visited your homepage many times for schematics, pics, etc.

 

The SPDT works since you are essentially using 2 switches so you don't get the "feedback." Use one side of the switch for one motor, and the other side for the other one. Being physically separated is what does the trick.

Stan

 

i ran my wiring for the wiper motor in the vacuum hose mounts on the windshield frame. and i used a 4-wire trailer connector to make the winshield removable as well as be able to fold down.