2 speed wiper motor with universal switch question?

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Johnny Mac

www.blueprintengines.com
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would a universal switch like the below work with a mopar 2 speed wiper?

I'm thinking no...because the Park position actually uses the low speed backwards...and it requires polarity to reverse? where this switch doesn't appear to do it?

I have low and high working with this switch, but off just appears to shut off. The OE switch was junk, but i did get it to momentarily run backwards to park if i jiggled it.

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The OEM switch is a sort of proprietary deal. If you are willing to forgo park, you can probably get it to work. You might get the aftermarket one to work by adding a relay. That will require some experimentation.
 
If I am reading the original post correctly. When the switch is jiggled it works temporary? Make sure the switch is grounded properly for the park to work. Mine would not park and gave me all sorts of issues on my Demon untill I tightened up the retaining nut. If I’m off base - sorry.
 
@Johnny Mac
Curious what ever happened here? Did you ever sort out the generic 2 speed switch?
I did not. The generic switch did not park the wipers. I used a double position rocker switch and just "bump" it to park, which I could have done with the universal one too, but everything else in the car is custom and already had a multi rocker panel.

The original switch basically came apart in my hands, and couldn't find a new 78 switch.

Good enough for the rare occasion I need it.
 
I did not. The generic switch did not park the wipers. I used a double position rocker switch and just "bump" it to park, which I could have done with the universal one too, but everything else in the car is custom and already had a multi rocker panel.

The original switch basically came apart in my hands, and couldn't find a new 78 switch.

Good enough for the rare occasion I need it.
Thanks for the info. It's about what I figured. It couldn't be that easy :p
Cheaper 2 speed motor but expensive switch. I need to come up with some kind of forward/reverse switch. Bump to park doesn't sound too bad either.............
Thanks, man!
 
I feel bad that I don't "know" these. The fact is, I've ever had "enough" to sit down and figure out how the variable/ or two/ or three speed setups work. The service manuals are somewhat lacking. And they are tricky, AND they changed designs
 
Thanks for the info. It's about what I figured. It couldn't be that easy :p
Cheaper 2 speed motor but expensive switch. I need to come up with some kind of forward/reverse switch. Bump to park doesn't sound too bad either.............
Thanks, man!

I feel bad that I don't "know" these. The fact is, I've ever had "enough" to sit down and figure out how the variable/ or two/ or three speed setups work. The service manuals are somewhat lacking. And they are tricky, AND they changed designs

I'm with you guys. i don't know squat about the original circuit, and my Dart hasn't had wipers or wiper motor in it for probably 10 years, so i didn't have anything to compare to. on this 78 i wanted it to remain more of a street car, with a functional heater, wipers, etc. I downloaded an original diagram, and looked for a switch, but for as solid as the car was, the GA sun seemed to turn everything under the dash to a brittle mess. I actually enjoy wiring simple things like fans, MSD boxes, etc, but i do get a little over my head on the amenities wiring.
 
I feel bad that I don't "know" these. The fact is, I've ever had "enough" to sit down and figure out how the variable/ or two/ or three speed setups work. The service manuals are somewhat lacking. And they are tricky, AND they changed designs
I'm learning more about the 2 & 3 speed, Del. I have a couple 3 speeds I can play with. You probably know more than I at this point.
My end goal for now is to come up with some way to run and park the motor from the dash without the factory switch.
What I think I know is, 3 speed-wise, the switch reverses polarity going to the motor causing it to run backwards until it parks.

In forward (dash switch on L,M,H) the islands and outer cam guide the rocker arm around the latch.

In reverse (dash switch off) the outer cam and longer island guides the rocker arm down into the latch which rotates the switch cam out to contact and open the park switch, stopping the motor.
As Johnny Mac confirms, it's fairly easy to mimic the forward part of this. How can we mimic what the switch tells the motor when it's time to park, is the answer.

That will be in the truth tables and wiring diagrams of the FSM, I think.

I know it would be easier to just buy all new or nos or rebuilt **** and be done with it. That's no fun...........
 
I'm learning more about the 2 & 3 speed, Del. I have a couple 3 speeds I can play with. You probably know more than I at this point.
My end goal for now is to come up with some way to run and park the motor from the dash without the factory switch.
What I think I know is, 3 speed-wise, the switch reverses polarity going to the motor causing it to run backwards until it parks.

In forward (dash switch on L,M,H) the islands and outer cam guide the rocker arm around the latch.

In reverse (dash switch off) the outer cam and longer island guides the rocker arm down into the latch which rotates the switch cam out to contact and open the park switch, stopping the motor.
As Johnny Mac confirms, it's fairly easy to mimic the forward part of this. How can we mimic what the switch tells the motor when it's time to park, is the answer.

That will be in the truth tables and wiring diagrams of the FSM, I think.

I know it would be easier to just buy all new or nos or rebuilt **** and be done with it. That's no fun...........
i thought about trying to put in a momentary switch that sent power back to the..."normal ground" but then the other switch would have to be in the off position, and you'd have to have a way to ground the otherwise 12V wire...or there may have been a different wire altogether that the ground circuit would have to run to, cant remember now. I guess at that point i didn't see any point in "bumping" it backwards having any benefit vs bumping it forward. in a factory setup the auto off would be nice. I drove an 86 K10 pickup to HS and college that didn't even have a park feature, or if it did, it never worked....so just bumped them around until at the low spot lol. First world problems :p
 
i thought about trying to put in a momentary switch that sent power back to the..."normal ground" but then the other switch would have to be in the off position, and you'd have to have a way to ground the otherwise 12V wire...or there may have been a different wire altogether that the ground circuit would have to run to, cant remember now. I guess at that point i didn't see any point in "bumping" it backwards having any benefit vs bumping it forward. in a factory setup the auto off would be nice. I drove an 86 K10 pickup to HS and college that didn't even have a park feature, or if it did, it never worked....so just bumped them around until at the low spot lol. First world problems :p
Well there ya go. Sounds like you have done the homework. Thanks for sharing that. Looks like there's a good reason the switches are expensive. Like you and Del said there's a few things going on there to park the wipers. So a new switch it is!
 
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