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windshield wiper wiring?

Discussion in 'Intermediate CJ-5/6/7/8' started by Strider380, Jan 5, 2008.

  1. Jan 5, 2008
    Strider380

    Strider380 Can I have a zip tie?

    New England
    Joined:
    Jan 12, 2006
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    1,117
    I'm changing my windshield wiper switch. just gonna put in a generic on off on toggle from my flaps. what are the three wires that go to the motor (red green black)? shouldn't there be two wires, one for each speed? the diagram in the fsm is of no help at all:cry:
     
    Strider380, Jan 5, 2008
    #1
    todd hofsaess likes this.
  2. Jan 5, 2008
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Not sure why you are puzzled by the three wires to the switch. I expect that's power in (+12V) and the two speeds to the motor. IIRC there are 4 connections to the motor: +12V, ground, and the two wires from the switch. Ground is through the windshield frame. You need the separate 12V wire in to the motor so that the park feature works when you turn the switch off. The two speeds work by connecting the motor field in two different ways.
     
    timgr, Jan 5, 2008
    #2
  3. Jan 5, 2008
    Strider380

    Strider380 Can I have a zip tie?

    New England
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    Jan 12, 2006
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    actualy theres 5 wires. 12 v in, the wire to the washer motor, then a factory 3 wire harness that goes straight to the wiper motor. the third wire must have something to do with the park feature, i didn't think about that. hmmmm...maybe it would be in my best intrest to get a replacement switch rather then a generic toggle. thanks!
     
    Strider380, Jan 5, 2008
    #3
  4. Jan 5, 2008
    Boyink

    Boyink Super Moderator Staff Member

    Tulsa, OK
    Joined:
    Sep 20, 2002
    Messages:
    6,197
    I lost the original author name...

    <p>The wiper is grounded through the case. The three wires are for the high, low, and park. Black is park, green is low speed and red is high speed.&nbsp; When the 12 volts is removed from high or low, the 12 volts that is always connected to the park wire will cause the motor to continue to run until it reaches the park position. At that time a cam inside the motor assembly will disconnect the park wire from the motor and everything stops.
    </p>
    <p>
    You’ll want to connect 12 volts to the park wire all the time, even with the wiper switch off. Then, if you also connect the 12 volts to either of the other two wires, the wiper will run. If you remove the 12 volts to the wire, the motor should continue to run until it reaches the park position at which time it will shut off.
    </p>
    <p>
    You can simulate the wiper switch by using a single pole double throw (SPDT) toggle switch to choose between high and low.
    </p>
    <p>
    You’ll need one 12 volt wire to a fuse (6 amps) to the park wire and branch that off to the center of the SPDT switch. The output of the SPDT switch should be connected to each of the other two wires.
    </p>
    <p>
    Just a note—the above does NOT apply when working with a Wrangler windshield. The grounding is different on them and you have to remove a ground wire first before you can do the above.</p>
     
    Boyink, Jan 5, 2008
    #4
  5. Jan 5, 2008
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    If you use a toggle switch, you'll need a SPDT center off switch, or else you won't be able to turn off the wipers unless you put another switch in the hot wire to the SPDT.

    The wiper switch is essentially a rotary switch - you can get a single-pole multi-position rotary switch and your choice of knob from Mouser or Digikey. These can be configured to however many positions you need, in this case 3: off (no connection) and the two speeds.
     
    timgr, Jan 5, 2008
    #5
  6. Jan 5, 2008
    Strider380

    Strider380 Can I have a zip tie?

    New England
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    i have all the correct toggles. so black is park and gets constant power. thanks, great article boyink!
     
    Strider380, Jan 5, 2008
    #6
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