Yet another wiper wiring question...HELP!!

[civilgee]

Ok...almost got the electric wiper with intermittent switch up and running. One problem, it only works on one speed. I have a 91 Ford bronco intermittent wiper switch, and the wipers only work on the last setting (high speed??? farthest away from intermittent). One last note, it does auto park. I cannot get the low speed or intermittent to work. When I put a test light to the low speed prong on the switch, I do not get power coming out of the switch. I have already replaced the switch thinking I had a bad switch. Any thoughts. How does power get to low speed so that I can check with my meter? Any tips would be greatly appreciated! Sorry for turning a wiper conversion into such a big deal! Many thanks!

 

[MnkyBiz]

I wish I could help you here, but I don't even have batteries in my rig yet!

Good luck!

 

[kwspony]

so you have had the same problem with 2 differant switch's? Is the motor grounded to the bracket/frame well?

 

[civilgee]

I noticed today that when I put a test light to the housing of the switch it is hot and lights up. Is due to the motor not being grounded good or do I have bigger problems? Please help!!!!!!

 

[civilgee]

Please Help!!!!

Anybody????

 

[kwspony]

is it possable you got the wires to the slow speed and the ground wired wrong? I don't think the housing should be hot. Unless maybe you got the ground hooked to the power somewhere. I will look for my wiring diagram and we can see how mine is hooked up. I also have a 91 bronco wiper switch and a 73 motor.

 

[kwspony]

http://classicbroncos.com/forums/showthread.php?t=54085&highlight=wiper

check out the wiring on this thread. Make sure the wires are all hooked right. does your washer pump work? there are 2 black wires on the switch, one is power to the washer pump and the other is a ground wire that goes to the wiper motor. The motor is grounded to the mounting bracket which is grounded at the window frame.

to the motor you should have 4 wires.
red---------park circut power to motor
black------ ground to motor
white-------slow speed power to motor
blue--------high speed power to motor

the switch will have a larger wire that is power from the fuse box. there will be a black wire on the housing of the switch for a ground but you may not need it if the switch is mounted to the metal dash.

 

[civilgee]

Right now I don't have the ground from the switch housing hooked up to anything because I am afraid it will cook something since it is hot. Also the switch is hanging in air by the wires. Is my problem that the switch is not grounded?

 

[MnkyBiz]

The switch doesn't get grounded.

I am going to talk while I think, so I hope it isn't too annoying.

Electrons come from fuse panel to switch via the orange/white. All that the switch does is send the electrons on their way (no grounding the switch needed)! The first fig is of the switch and the second is the motor.

With the switch in park, the Red & Black wires get power. In the park position, inside the motor, the red wire is an open circuit, so no power to the motor from there. The black powers the motor to return the wipers until they reach the start & push a switch inside the motor to ground the black wire to the body of the wiper motor.

The blue & white wires respectively power the high & low functions of the motor. So If I were a betting guy, I would guess that your low speed function INSIDE the motor is dead. Did it function before you started the conversion? If it did, try doing a manual connection or maybe jumper the high speed line to the slow speed connection & test it that way. If the low speed works at that point, I would say your wires through the windshield are crap. If that doesn't work, then I would guess your intermittant box is what is dead & you need to get a new one.

I hope that that made any sense.

 

[civilgee]

to test the motor, I hooked the high speed wire to the washer prong since I know it gets power. When I depress the switch, the wipers run on high speed. So it appears that the motor runs on both high and low speed. I don't understand why the switch is hot? I guess I will carry the switch back fror a third time and try it again. I wonder what the limit is on returning merchandise? Thanks for the help and let em know if you have any more input. The good news is that I am welding in my floor pans on Sat.!!!! ;D No more holey floor pans.

 

[kwspony]

I don't remember , but can't you remove the intermittant box from the switch and hook the switch directly to the plug going to the motor? That would maybe tell you if it is the switch or the intermittant box.

 

[MnkyBiz]

You can't do that with mine. the 7plug switch on the intermittant box has the 6 prongs in different locations than on the switch!

 

[civilgee]

The intermittent box is made into the switch.