Dual electric wiper motor wiring

[snipes243]

Does anyone know if it’s possible to wire the dual electric wiper motors to the centach wiper switch? I have the wipers operating but they won’t return to park.

I currently have the low speed wired (white)to the low speed post(L) . The high speed wire(blue) is wired to the (H) post. The power park wire (red) is on the (P) post. And power is coming from the orange wire on the (B) terminal. The black park switch isn’t being used. Any help is greatly appreciated.

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[DirtDonk]

Not sure, but with wipers one thing to always make sure of is that your body is well grounded, and if needed that the windshield frame is grounded separately too.
I've worked on a couple of Broncos where none of the wipers worked properly until I added a small jumper wire down at the cowl/door area.
Apparently 40+ years of rust and paint have had their way with the already weak grounding scheme of the Bronco.

Do you at least have the minimum body grounds still intact?

Paul

 

[snipes243]

Right now I have been essential bench testing it, before I cut all the wire down from the centach harness. I am currently using the supplied ground wire for a fiberglass body from the centach but I will double check that.

Last question is the park supplying voltage to the motor or grounding the motor? I unfortunately have been able to locate a diagram for the switch.

 

[WILDHORSES]

Your motors are not synchronized so I don't think they will park with the stock switch or most aftermarket switches. You can wire in a toggle switch on one motor and turn it off then the other should park.

or

I do have a nice option to sync them. Gives you intermittent and sync for dual wiper motors. https://www.wildhorses4x4.com/produ..._Wiper_Switch_Intermittent/Bronco_Wiper_Parts

Jim

 

[Slednut10]

The park function supplies 12v. Once the motors are out of synch, they won't park because power will backfeed from one of the motors. You could try using a diode on each park wire to block the backfeed.