1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

wiper switch schematic?

Discussion in 'Early Jeep Restoration and Research' started by termin8ed, Dec 3, 2004.

  1. Dec 3, 2004
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    3,750
    I'm trying to figure out the switch wiring on the 68 here. I've got the 2 upper jeep wiper motors with the park circuitry.
    I have a new rotory switch that is supposed to be for the 68-?? wiper motors.

    ANyone have a picture of how the wires hook up to it? I have 2 yellow(low), 2 brown(high speed), 1 red/white stripe(?park?), and a blue lead which grounds to the case of the wipers.

    I know how(i think) the low and high speed hooks up, but how the heck does the park stuff figure in?

    Thanks.
     
  2. Dec 3, 2004
    timgr

    timgr We stand on the shoulders of giants. 2021 Sponsor 2020 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    22,714
    There's a 1972 manual online at c104.net. It shows the switch controlling the ground of the motor. Others haer have done the wiring differently, but I think it's clear that the motor has to have power all the time, and its own ground through the windsheild. There's a switch in the wiper motor that completes the circuit if the motor is not in the park position; thus the motor keeps running until it's at park. Then, at park, it either stalls or keeps going, depending on the position of the dash switch.
     
  3. Dec 3, 2004
    kucerae

    kucerae New Member

    Merritt Island, FL
    Joined:
    Oct 30, 2004
    Messages:
    40
    I've got the schematic from my 1974 CJ TSM, but my colors are completely different than what you have listed. If you want, I can scan it & E-Mail it to you.

    Eric.
     
  4. Dec 4, 2004
    schardein

    schardein Low Range Therapy

    Success, MO
    Joined:
    Aug 11, 2003
    Messages:
    553
    I'll throw in some knowledge.
    The overhead wipers use a rare switch, which is different from the commonly available later switches.
    The factory switch has 4 connections on the back that are female bullet type connectors. If you have the spade type connectors I do not think it is the right switch.
    It has been awhile since I did this so bear with me.
    1. power in (always hot, or ign hot)
    2. power out to motor one
    3. power out to motor two
    4. power out 2 leads(always hot, same as 1)

    The always hot lead has 2 wires. These are the park connections, one to each motor.

    The power leads are separate on the switch, if you put them together (to use a toggle switch because your rare factory switch fell apart) the motors will backfeed each other and keep running even after you turn them off, until they both happen to hit park at the same time.
    You can cure this by putting a diode in one of the power wires.
    Can the other type switch be made to work? Don't know.
    The motors need a good ground.
    Mine are single speed originals.
    I have seen identical motors that are 2 speed. (have one in fact, oops maybe not identical, I think the wiper arm hookup is a different size)
    Hope this helps, let us know how it goes. I can get a pic of my (bad) original switch.
     
  5. Dec 4, 2004
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    3,750
    I'd appreciate that. Not sure if its the same since by 74 the wipers are on the bottom, but the switch said it was for those years too.

    I have those 2 speed motors. not sure if the 4 prong switch would work or not. I think I'd have 2 extra wires with that setup.

    I'm pretty sure the aftermarket switch I bought has 5 lugs on the back. I'm pretty sure I identified the positive lug, low and high speed, and I'm guessing the hot(park) lead since when the switch is in the off position, it has continuity with the positive lug. Theres also the 5th lug witch is in the middle of the switch. Thought I had it hooked up, but sounds like the ground has to be hooked up on it.


    I don't know where these came from really. I know they were hooked up on the 68 that I originally got that was in the accident. I guess I should go see if I still have the dash from it and see if there's a switch on it. Might have to do what Stan shows on his webpage with the diodes. Just trying to get everything as close to original as I can... :?
     
  6. Dec 4, 2004
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    3,750
    guess I should say too that the low and high speeds work, I just can't figure out the park on them. I thought I had them working with park last winter when I was playing with them out of the jeep.???
     
  7. Dec 4, 2004
    schardein

    schardein Low Range Therapy

    Success, MO
    Joined:
    Aug 11, 2003
    Messages:
    553
    Wipers was a huge isue for me. I drove it for 3 years with the wipers wired so they just stopped where I turned it off. Thought it was right. Then I messed with them one day and found they had a park. WHAAAAAAAAAT???
    Research:
    1. The FSM, page 217 , H141, "early production vehicles equipped with the dauntless v6 have two SINGLE speed w/s wipers mounted above the w/s" blah blah "current production vehicles with stationary w/s have a 2 speed motor mounted below the w/s outside the vehicle on the drivers side". By stationary I guess they mean not the "venting" or flip out w/s, as opposed to fixed like a postal where it does not fold down, but????.

    fig h-65 pic of switch connection 1=park (black) 2=low (green), high(red), the 4th unlabeled connection is for B+, which has a circuit breaker like the headlight switch.
    fig h66 B=battery
    1=motor 1 low
    2=motor 1 high
    3=motor 2 low
    4=motor 2 high
    5=park

    The first switch looks like mine but no circuit breaker. HOWEVER, that is not how it works. Rather than high and low, it is just power for each of the separate motors, which I guess includes some kind of diode inside, because when I replaced it with a toggle that is when I had to put a diode in one of the power wires.

    This may ask more questions than answer them, but it is what I know.

    Also, the park point can be modified some by removing the cover of the wiper motor. There is a contact inside the cover that can be turned to control the location the wipers park at. You can see where it is on the outside because there is a rivet with like a toothed washer on it IIRC.

    How about a pic of your 2 speed motors, especially where the wiper arm hooks to, I can see if they match mine. I will get some pics of mine and my switch.
     
  8. Dec 4, 2004
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    3,750
    Hmmmmm.
    Maybe I just have 2 lower motors that some po put up on top.

    I'll get a pic of each and post them in a little bit.

    My ohm meter has a diode check function. Maybe I should give that a try on the mysterious 5th conection in the middle.

    Thanks Greg. 8)
     
  9. Dec 4, 2004
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    3,750
    Ok, the more I think about it this has to be a factory setup because the wireharness looks original with factory eyelets.

    Here's the new switch I have.

    along with a close up of the wiper motor.
     
  10. Dec 6, 2004
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
    Joined:
    Jul 30, 2003
    Messages:
    8,269
  11. Dec 7, 2004
    schardein

    schardein Low Range Therapy

    Success, MO
    Joined:
    Aug 11, 2003
    Messages:
    553
    Here is a pic of a NOS factory switch. Just got it off ebay awhile back, and actually have not received it yet. Have not seen another in 4 years looking.

    The other photo shows some motors I have. At top is a 2 spped model dated 74. Don't think it is from a Jeep, but who knows? Note the skinny threaded mounting rod, and the wiper arm attach uses a nut. Also "spade" terminals.

    The bottom 2 are basically the same, single speed, "normal" thickness of mounting arm, "normal" splined attachment for wiper arm. The difference is in the housing. With the motor removed, the one on the left retains the brushes, where the one on the right does not. This meant something to me a year ago when I messed with them, can't remember now. I think one was much easier to work on and repair. Don't remember which I thought was a stock CJ, or maybe both but different years?

    I once had a link to a website that sold these new. Their business was supplying parts to big rigs as I recall. They had these type motors brand new with many options, 1 or 2 speed, 12 or 24 volt, different wiper arm mounting and length, etc. Kinda pricey but I really thought about it before finding a good used one. Especially thought about getting a pair of 2 speed motors with a stock type wiper arm setup.
    One of my stock motors broke a drive arm inside the housing. It had leaked and let water in and the rust eventually caused it I think. The other is stock and looks brand new inside. Keep them well sealed!!!!

    As for the switch, it is
    1. power in
    2. power out that is hot when power in is hot, for park
    3. power for motor
    4. power for other motor

    What I may be able to do is tear apart my old one and see if there IS a diode in it. There must be, the way it worked. The old switch froze up and quite working when I parked my Jeep for 2 months with no top on it. (Due to Uncle Sam sending me on a mission with zero advance notice).

    Don't know if this helps, just FYI I guess.
     
  12. Dec 7, 2004
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    3,750
    hmmm. none of those motors looks like mine. The one on top kinda does, but mine has the wider shaft like the bottom two do for the wiper arms. I got the schematic for the 74 today and that might help. I'm going to give it a shot later. I see the one contact in the middle of my switch is for a wiper motor, so thats pretty much useless to me right now. Don't think I had the ground and power in leads hooked up at the same time. I'll try with all the connections and see if it works this time...

    Thanks btw. ;)
     

Share This Page

New Posts