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Electric Windshield Wiper Conversion

Discussion in 'Jeep Truck and FC Tech' started by FinoCJ, Nov 13, 2019.

  1. Nov 13, 2019
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member Sponsor

    Denver, CO
    Joined:
    Jul 18, 2013
    Messages:
    2,430
    Looking to swap out the vacuum wiper system for an electric system....This is the most common found from a number of the standard willys/jeep parts suppliers:
    Windshield Wiper Motor Conversion Kit in 12 volt Fits 46-64 Truck, Station Wagon, Jeepster

    Also found this one - which kind of looks like the same thing, but maybe a bit cleaner looking and more money:
    New Port Engineering | 1946-64 Willys Wiper Motor

    Anyone have experience with these, suggestions or better options? Also, it looks like these things pull close to 20A (on 12V system)....I don't want to overtax the generator and electrical system - seems like 30A or so is what an old generator can put out - and not necessarily for extended run times? Running with headlights in the rain might be too much, but Colo isn't that wet. Eventually I hope to swap things over to a higher output alternator. Thanks!
     
  2. Nov 13, 2019
    PeteL

    PeteL Member Sponsor 2019 Sponsor

    Hills of NH
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    Aug 3, 2003
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    6,495
    I imagine the 20 amp fuse is to protect at full stall. Normal running probably would draw less power.
     
  3. Nov 13, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
    Joined:
    Sep 21, 2002
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    9,216
    I've got that 2 speed setup. With the lights on and wipers on high I didn't notice it pulling enough amps to be of a concern when it used to be my DD. The more expensive one you posted has more wires than mine...I've got 2 wires and a ground. I wonder about the difference in the motor.
     
  4. Nov 13, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
    Joined:
    Sep 21, 2002
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    9,216
    Mine also came with a switch like the second one, only thing I don't like about it is the switch is hard to turn. I think it is because it seems to be a fairly sturdy switch.
     
  5. Nov 14, 2019
    Keys5a

    Keys5a Sponsor Sponsor

    Florida Keys
    Joined:
    Jan 23, 2014
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    2,269
    Before you invest in an electric replacement for the vacuum motor, make sure all your cables and pullys are not frayed and are in working order. Have you been up under the cowl to see the RubeGoldberg factory setup?
    I have used individual marine wiper motors in a past Wagon, and they worked fine. That Wagon had a tangled mess up under the cowl.
    -Donny
     
  6. Nov 14, 2019
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
    Joined:
    Aug 13, 2015
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    3,447
    ^This.

    I modified a wiper motor from a car to work in my old willys pickup, only to have the network of trapeze wires self destruct a week later. I’d probably come up with my own solid linkages (a la Bad Obsession) before I’d go individual motors, but I'm... neurotic. It bothers me when the wipers aren’t in sync.
     
    45es likes this.
  7. Nov 14, 2019
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member Sponsor

    Denver, CO
    Joined:
    Jul 18, 2013
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    Yup...initial inspection shows the cables to be in good shape/not frayed, but I haven't checked to see if the tension is appropriate or if the pulleys are turning smoothly...the only thing more ridiculous than that cable and pulley set-up is the cable and pulley set-up from the PO to operate the clutch fork with the engine swap! (I'll get pics of that up soon, as these are the next two things on the list to work on).

    My wipers are perfectly in-sync! Both are at the bottom of the movement at the exact time...of course, they are never not at the bottom at the exact same time, or rather all the time....Out of sync wipers are bothersome, but non-functioning wipers is more bothersome....
     
  8. Nov 14, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
    Joined:
    Sep 21, 2002
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    There are places that rebuild the mechanisms.
     
  9. Nov 14, 2019
    Buildflycrash

    Buildflycrash Member Sponsor

    Gulf Breeze FL...
    Joined:
    Jun 5, 2007
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    1,041
    Any wipers work well with a fresh coat of Rain-Ex.
     
  10. Nov 14, 2019
    maurywhurt

    maurywhurt Member Sponsor 2019 Sponsor

    Western North...
    Joined:
    Dec 12, 2009
    Messages:
    515
    If you want to consider going with something like the original top-mounted electric wipers that were first installed on the early '67 CJ's - assuming they would work on your particular vehicle - Willys Jeep Parts in Yuma, AZ has the closest I've been able to find to the original wiper motors, arms, blades, and spacers you'll need.

    These are NOS, OEM American-made motors, though they are the two-speed type (those on my '67 CJ-5 are one-speed, and pretty slow). See kit number 977343-K:

    Electric Windshield Wipers

    BTW you can also get the wiper arms and blades from Walcks, though I'm not sure of the difference in price.

    Here's the correct two-speed switch:

    NOS COLE HERSEE 2 SPEED WIPER SWITCH AMERICAN BOSCH SCTA RAT ROD HOT ROD | eBay

    This switch will fit the original two-speed windshield wiring harness. This harness is a separate add-on from the main wiring harness (at least it was on the CJ's), but Walcks can make one for you.

    I also found a source for the correct wiper knob (see Wiper motor question? ), which is hard to find, and is not the one that will come on that switch. This guy runs a parts house for Postal Jeep parts, which shared the same wiper knob. If you email him I think he will sell you one for around $8: Gary Pounds <gary.pounds@icloud.com>

    You can see how the motors are mounted in this thread I started on rebuilding my original wiper motors here:

    Rebuilding American Bosch Wwf Electric Wiper Motors

    Before installing them, you would want to open up the gearboxes on these motors and make sure the wipe angles are set correctly for your windshield. I would also check the grease in the gearboxes and consider cleaning out and replacing it.
     
    Last edited: Nov 16, 2019

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