Wiring intermittent switch from 80's Bronco to WH dual electric wiper motors

[74 Bronco Billy]

I have a 80-90s wiper switch from a bronco with the thermostat control of slowing wipers. It comes with a big black box, and the stem of the switch was long. I cut it down, flattened the side to make just like an early Bronco switch, including push for washer.

The 1st difference I noticed was only 6 blades in the switch housing instead of 7 like our old bronco switches. Then there's the part where I need 6 wires (not 4) to control the new dual WH wiper motors. Park, low speed, high speed, hmm, not really sure how to wire this up.

If you've done this mod, I'd love some hints or a wiring diagram I can make sense of.

Thx for any help.

Forrest

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[Jdgephar]

You can only use the delay wiper switch and module with the stock wiper motor, not the aftermarket dual motor setup. Or get the Cole Hersee switch for dual motors.



Edit: I take that back...it might be possible. Let me look at the schematics a little bit more...the ford motor parks differently, but it might work...

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[Jdgephar]

Ok, here's my go at the 6 wire switch. I can't tell if you have the 6 wire or the 7 wire, since I can't see the black housing female connector.

Low speed, high speed, and park should work fine. I'm not 100% sure delay will work, but it should.

Also, this will not synchronize the wipers in low or high speed.

Make sure the wipers have a good ground, and the little wire on the switch has ground.

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[Jdgephar]

Ah crap, you are going to need a diode going to each of the low speed posts on the motors. Otherwise both motors are going to stay on while they both try to self park each other when you turn off the switch. Web info recommends a 5 amp diode.

You can use 1 diode like this shows, but motor two parks after motor 1. If you use two diodes, they will both park asap.

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[74 Bronco Billy]

Rewire my Wipers

You can only use the delay wiper switch and module with the stock wiper motor, not the aftermarket dual motor setup. Or get the Cole Hersee switch for dual motors.

Aw c'mon man, what's with the negativity?


Edit: I take that back...it might be possible. Let me look at the schematics a little bit more...the ford motor parks differently, but it might work...

This sounds good, thanks

Ok, here's my go at the 6 wire switch. I can't tell if you have the 6 wire or the 7 wire, since I can't see the black housing female connector.

I have the 6 wire, only 6 tabs on switch and 6 on red connector to.

Low speed, high speed, and park should work fine. I'm not 100% sure delay will work, but it should.

Also, this will not synchronize the wipers in low or high speed.

Make sure the wipers have a good ground, and the little wire on the switch has ground.

I have a solid grounding post for the black wire, but it might be tough to run a wire up to the two motors. I plan to use a grounding post with dielectric grease on the windshield frame.

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Ah crap, you are going to need a diode going to each of the low speed posts on the motors. Otherwise both motors are going to stay on while they both try to self park each other when you turn off the switch. Web info recommends a 5 amp diode.

You can use 1 diode like this shows, but motor two parks after motor 1. If you use two diodes, they will both park asap.

Jdgephar, you are awesome. I can do wiring diagrams. Now where do I buy the diodes, and where exactly does the 2nd diode go because it doesn't look plain as day to me where to put the 2nd diode.

Lastly, since I have the 6 wire switch, where does the wiper wire go? I know I can push in the late model button, so, shouldn't that be able to trigger the washer? But if the tab for it is missing on the 6 wire switch, should I just wire up another switch on my rockers for a washer? I've attached a rocker picture for Bronco porn

Thanks for the help, you are a project saver.

Forrest
The Eternity Build 4.10 years in the making

 

[Jdgephar]

Here's an updated picture. The 6 wires from each wiper are drawn out for you. You will combine the two high speed wires and connect to the delay box connector. The diodes go on each wire for the low speed to each motor. The anode end of each diode you will connect together and then connect to the delay box connector. Connect the two park wires together and connect them to the delay box connector. The washer pump wire (I don't know what color wire yours is) is labeled on my diagram and connects to the delay box connector. That way the washer pump will run when you push on the switch. You can use common 1/4" crimp terminals on the wires and plug them into the delay box socket one by one. The red connector plugs directly into the wiper switch, no mods needed.

I have to order diodes online, there's no stores that carry anything near me. They are pretty cheap on Amazon.

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[74 Bronco Billy]

Here's an updated picture. The 6 wires from each wiper are drawn out for you. You will combine the two high speed wires and connect to the delay box connector. The diodes go on each wire for the low speed to each motor. The anode end of each diode you will connect together and then connect to the delay box connector. Connect the two park wires together and connect them to the delay box connector. The washer pump wire (I don't know what color wire yours is) is labeled on my diagram and connects to the delay box connector. That way the washer pump will run when you push on the switch. You can use common 1/4" crimp terminals on the wires and plug them into the delay box socket one by one. The red connector plugs directly into the wiper switch, no mods needed.

I have to order diodes online, there's no stores that carry anything near me. They are pretty cheap on Amazon.

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Thanks Jdgephar, this helps. I do have questions since the switch is 6 tabs, the red is 6 tabs, so what you are showing is the black housing with 5 tabs. I will look at that tonight.

I want to order the diodes from Del City today, so, I found 6 amp 35 V DC, figured they would work. I have to figure out which end is the anode. Thanks a lot.
Forrest

 

[Jdgephar]

Thanks Jdgephar, this helps. I do have questions since the switch is 6 tabs, the red is 6 tabs, so what you are showing is the black housing with 5 tabs. I will look at that tonight.



I want to order the diodes from Del City today, so, I found 6 amp 35 V DC, figured they would work. I have to figure out which end is the anode. Thanks a lot.

Forrest

Correct. You won't use all of the tabs in the black housing. Some of those unused tabs are for the way Ford decided to make the park function work. The difference between the 6 wire version and 7 wire version of the delay boxes is how the washer pump part of the switch works. The 6 wire version draws power directly from the orange wire and connects it to the washer out pin when you press on the switch. The 7 wire version you have you provide the 12v source power for the washer pump to the switch also.

Cathode end of the diode will be the stripe on the diode. Anode end has no stripe. Put the stripe on the wire end that goes to the wiper motor.

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[74 Bronco Billy]

I think I got this now, so (-) Cathode end with stripe will be connected to wiper motor, each diode going to one motor on the low speed leg. I'm learning something new every day, thanks.


Forrest

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[BoltTurner]

Question for those that have installed dual wiper motors - can you still use the wiper cover if you keep the old motor mount on the passenger side and bracket on the driver side

 

[Jdgephar]

I never had a cover on mine, so I don't know for sure. My guess is that the cover would be too small for the driver side motor to fit inside.