Ballast Resistor for wiper motor?

[Moparfiend]

I am getting only high speed and no park on my wiper motor. I don’t see an external resistor and understand this controls the wiper speed and park. I am enclosing a picture of my wiper motor as it looks different from other wiper motors that had resistors externally mounted. This I believe is the factory original motor. Can anyone tell me if I need an external resistor and how it would be hooked up?

Thanks for your assistance on this MF

 

[493 Mike]

Have you been trying to use this without the ground strap connected?
Mike

 

[gkent]

You need the ground strap and a ballast resistor. BTW ... not a very good pic !!

 

[Vaanth]

I am getting only high speed and no park on my wiper motor. I don’t see an external resistor and understand this controls the wiper speed and park. I am enclosing a picture of my wiper motor as it looks different from other wiper motors that had resistors externally mounted. This I believe is the factory original motor. Can anyone tell me if I need an external resistor and how it would be hooked up?

Thanks for your assistance on this MF

View attachment 1896810

The resistor used on Chrysler two speed car wiper motors from 1968 through ~1976 on passenger cars and into the 1990s for some applications including minivans, is the wiper motor torque limiting resistor, part number 2822261, and ranges 0.25-0.5 ohms in resistance. It is an open back, ceramic power resistor. The resistor limits current and results in a lower applied voltage to the motor for low speed operation. Although it is a power resistor, and looks similar to one, it is not the same as an ignition ballast resistor.

The resistor mounts with a metal strap to the hole at the upper edge of the motor. The same screw secures the ground strap to the body of the wiper motor and between the mounting nut and the rubber bushing ferrule as shown in the following image. The two loose wires seen in your picture connect to the resistor terminals as shown in the following image.

 

[Moparfiend]

You need the ground strap and a ballast resistor. BTW ... not a very good pic !!

Sorry it is what I had in my library. Here is a better picture I hope.

 

[Moparfiend]

The resistor used on Chrysler two speed car wiper motors from 1968 through ~1976 on passenger cars and into the 1990s for some applications including minivans, is the wiper motor torque limiting resistor, part number 2822261, and ranges 0.25-0.5 ohms in resistance. It is an open back, ceramic power resistor. The resistor limits current and results in a lower applied voltage to the motor for low speed operation. Although it is a power resistor, and looks similar to one, it is not the same as an ignition ballast resistor.

View attachment 1896882

The resistor mounts with a metal strap to the hole at the upper edge of the motor. The same screw secures the ground strap to the body of the wiper motor and between the mounting nut and the rubber bushing ferrule as shown in the following image. The two loose wires seen in your picture connect to the resistor terminals as shown in the following image.
View attachment 1896883

Awesome thank you very much!

 

[Moparfiend]

Awesome thank you very much!

I was wondering where those two connectors went to. When I got the car, there was no resistor.

 

[Moparfiend]

Question without the ballast resistor, I understand that the lower speed will not work at all, which is the case for me. However, will not having the ballast resistor also cause it not to park? When shut off the arms are in all different positions.

 

[gkent]

If the arms are each in different positions you need to take one or both off the pivot(s) and clock it to the correct or desired position. They can be a bitch to get off. There is a small clip under the base that has to be held back then the wiper pulled off. Good luck!

 

[gkent]

You could also jump those two loose wires together. The motor will only run fast on either speed but it will work. The "park" is controlled inside the base of the unit and isn't accessible.

 

[Vaanth]

Question without the ballast resistor, I understand that the lower speed will not work at all, which is the case for me. However, will not having the ballast resistor also cause it not to park? When shut off the arms are in all different positions.

Troubleshooting no park, or stopping in any position, from the factory service manual:

Testing procedures are also in the factory service manual.

 

[Moparfiend]

Thanks guys. I am sure to develop at least one more question when I get in there.

 

[Kern Dog]

Sorry it is what I had in my library. Here is a better picture I hope.

View attachment 1896917

This is my Jigsaw Charger. Ugly but functional.

That is how the 2 speed wipers look for 55 years of use and neglect.

 

[Moparfiend]

This is my Jigsaw Charger. Ugly but functional.

View attachment 1897126

That is how the 2 speed wipers look for 55 years of use and neglect.

Thank you KD that’s a good example of how the ground strap is hooked up unlike mine.