What does it take to convert 2-Speed Wiper to 3-speed?

Electrical & Ignition

  1. Henrius

    Henrius Member

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    I believe the 3 speed wiper was an option in 1972. Higher trim line Chryslers have them.

    One thing is a different switch. Is the wiper motor different as well? But do cars like the Newport have wiring harnesses for both 2 and 3 speed switches? I think the 3-speed switch has another lug.
     
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  2. traintech55

    traintech55 Senior Member FCBO Gold Member

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    I have converted many of the two speed cars over to the three speed. You will need the correct wiper motor for your car, the linkage from the motor to the wiper pivots, and the new switch. When you have the system apart replace the bushings throughout the whole system.
     
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  3. Davea Lux

    Davea Lux Senior Member FCBO Gold Member

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    The wiper motor is a different unit. The three speed unit has an extra wire on both the switch and the motor assembly, if I remember correctly, the wire for the three speed unit is present but unused on two speed applications.

    Dave
     
  4. traintech55

    traintech55 Senior Member FCBO Gold Member

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    The wire harnesses for the two, and three speed systems are the same.
     
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  5. Wildaugust

    Wildaugust Senior Member

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    There's a difference in the appearance of the motors as well. This is a 2 Speed motor


    3799307-350x350.jpg

    and this is a 3 Speed motor.

    s-l1000.jpg
     
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  6. Henrius

    Henrius Member

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    The two and three speed motors take different linkages? Anyone who sells refurbished motors and linkages?
     
  7. traintech55

    traintech55 Senior Member FCBO Gold Member

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    The linkage from the motor to the wiper pivot is different, but the pivots and the connector arm for the pivots are the same.
     
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  8. Henrius

    Henrius Member

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    But one question, if I may. Some 1970s cars had "hidden" wipers under the hood lid. These wipers had a "park" position to conceal them. Are these motors different, or is it in the linkages?

    The reason is, I see many adds for rebuilt 3 speed motors for A, B and E cars, but I wasn't sure they would interchange with my 1972 Newport. I don't see any rebuilds advertised for C bodies, and did not know if they were different.
     
  9. 1970cat

    1970cat Senior Member FCBO Gold Member

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    the other body styles have different shaped plugs that go into the bulkhead connector. i can't speak for the later motors, but the 3 spd motor on my 69 fury has a built in park mechanism.
     
  10. traintech55

    traintech55 Senior Member FCBO Gold Member

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    Because the park mechanizm is internal on the 3 speed motor you must get the exact motor for your car.
    If not the park position and the wiper sweep will be way off.
     
  11. cbarge

    cbarge Senior Member FCBO Gold Member

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    Chrysler used the same 3spd motor for all body styles (A B C E) to keep manufacturing costs down.
    The trick they did is the plate on the motor is adjustable. The three notches at 9 oclock at the motor you can back off the flat head scews and index the plate to its respective body style.
    I read that in a mopar magazine byt cannot remember which notch is c body. Of course i have the magazine stowed away in the man cave lol
     
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  12. traintech55

    traintech55 Senior Member FCBO Gold Member

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    Incorrect. The difference is in the gear and arm assembly behind the plate. That and the arm that connects the motor to the wiper linkage.
     
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  13. cbarge

    cbarge Senior Member FCBO Gold Member

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    Ok. The 3 speed wiper motor housings minus the guts are interchangable. Yet the 2 speed and 3 speed wiper motors are toally different.
     
  14. traintech55

    traintech55 Senior Member FCBO Gold Member

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    That is correct. That is why you have to get the correct motor for your year and make. Once you get the correct parts it is a plug and play deal.
     
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