windshield wiper wiring

hi does anybody know if you can use a four wire wiper motor and convert it to a three wire thought i heard you could but not sure what wire to omit 74 cj-5 thanks

 

Is that a motor with a park position?

 

not sure friend has it is there a way to tell

 

If you are asking whether you can use the '76 and later motor on a '74, yes. But you have to take the motors apart and switch the brackets between them. The motors themselves are the same. They both have 3 wires and a ground through the motor case. So 4 wires is actually 3 wires and a ground wire (in addition to any ground through the windshield frame).

 

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Maybe this is what you are looking for. Four wire wiper w/auto-park connected to a three wire switch?

 

i have a 76 or newer windshield so i could get a new supper top didn't like the tiger top is the 3 and4 wire colors the same on the wiper motor so i can switch the plastic plg or what do i have to do

 

If you have the auto-park motor you will have to use all four wires. Do you understand the diagram I show of the motor/switch set-up? You will have to use a diode as shown and solder it into the circuit. This diode does not come with the original set up.

 

Walt, I believe that's not true for the factory motors mounted on the windshield. There are two wires for the two speeds, both to ground through the wiper switch. Both grounded is low speed, one wire grounded is high speed (connects a bucking field, or not). There is a power wire to the motor, energized when the ignition switch is on. The park switch goes to ground through the motor frame.

Take a look at the wiring diagrams for '74 and '76 here: http://oljeep.com/edge_parts_man.html

 

Tim...........since your on the subject of Windshield Wiper motors here is another question: I just picked up a 72-75 rounded top Windshield frame to replace my old "Small View: frame on my 1965 CJ...........since I will probably have to replace the old motor in the 72-75 frame anyway and do not have a wiper switch..............what are the best options for replacements beings I have a clean slate to work from anyway regarding motor & switch? IE; 2-3 speed , park and delay? Or?
Thanks

 

The original motor only supports two speeds and off. When both connections are grounded, the motor runs slow. When only one is grounded, the motor runs fast.

The original switch is rotary for the two speeds and off. Push on the switch to activate the squirter.

The park switch is built-in to the motor. There is a microswitch and a cam that grounds the high-speed wire in parallel with the switch, when the blades are at any position but park. So the only way the motor can be off is if the switch is off and the blades are at park.

If you want delay, you'll have to make an intermittent circuit, or buy some additional device to run the motor intermittently.

I'll look up some parts later.

 

Tim I am un-able to read those schematics clear enough on my comp/monitor either 74 or 76 so I will take you word for it and bow out of this one. Tnx for your reply.

 

I made this schematic long ago -



working from this description? (sorry it's so small)



Maybe this helps.

 

hi back again i got myw iper motor working but its on all the time turn left high turn ,right high, middle low can't turn it off any suggestions switch or motor all i did was took the gear cover off it was dry no grease put lithium in it and bench ran it worked on low and high put back together sprayed switch with krol oil worked back and forth loosened right up any help thanks

 

Looks like this?



If so, follow the schematic above.

 

The motor runs round and round, and the linkage converts it to back and forth. Like an old steam locomotive.

So if you reverse the motor direction, that won't change the sweep of the wipers. If the wipers are trying to wipe the hood, the linkage has to be upside down inside the windshield frame?

This is for later years, but it works the same way.



The park switch determines the location of the park position, and it's fixed wrt the motor case.

 

Well, the motor only parks at one point in its rotation. You cannot change that. If you take the motor off, there is an arm on the motor that pushes/pulls the link that moves the wipers. If that were 180 degrees out of phase, then the wipers would park at the wrong end of their sweep.

 

do they travel past where they park in normal operation?