How To Test a Mopar 3 Speed Wiper Motor

I get asked this question alot. Seems 99% of the "problems" with three speed wiper motors is ground related. Gotta have good ground. So, since I get asked the question frequently, I'm going to try to give the answers where you can find them easily...just bookmark em?

If you do not have the proper functions, 99% of the time it is a ground problem. If you experience this, first run a ground wire from the metal housing on switch to the pin switch for dome light in driver’s door jamb. Run switch again. If you still have a problem run a ground wire from the wiper motor ground strap to the negative battery post. Run switch again. If you still experience trouble:

(1) Disconnect motor leads at bulkhead disconnect.

Connect jumper wire from battery positive terminal to brown and red leads in bulkhead disconnect. Connect a second jumper from the green lead to ground. (The ground circuit is completed through the car body). The motor should run continuously. Disconnect leads.

(2) Connect jumper wire from green lead to brown lead. Connect red lead to ground. Connect third jumper wire from battery positive terminal to blue lead. The wiper should run to the park position.

CAUTION: Motor can be damaged if not wired correctly

If you have any questions, please feel free to contact me.

Mopar 2 Speed to 3 Speed Wiper Motor Conversion

If you are doing a conversion on a 70-71 E-Body or a 71-74 B-Body from a 2-spd. to a 3 or variable spd. motor, you will have to replace the wiper motor crank with part #2822289-(70-71), also the link from the motor to the driver's side pivot with part #2822293(70-71)or crank with part #3431518 and link #3431102 (72-74). You will need a variable speed switch ending with part number 3488380 (1970-71 Application: B,J CV, L Dash SW Bezel,PU2947792SOP,Ribbed) or part #3488380A (1970-71, Application: 1970-71 B,J CV, L Dash SW Bezel,PU3488406SOP,Smooth).

If you are doing a 2 to 3 speed conversion on a 68-70 B Body application, you will have to replace the wiper motor crank with part #2822273, 3 speed bushing part #2580200, and a 3 speed switch part #2864014. The rest of the linkage, wiring etc remains the same. If you find any information that you find contrary to what I have posted here, please contact me. While I'd love to say I have one of every model, I don't, these numbers, etc. have been researched and/or put into practical application and duly noted...I'm not perfect and I'm always willing to learn!

Check out Boog Mopar

Hey everyone.  Check out my European contact for wiper motors and other Mopar restored parts.  Andrea and I have been doing business a couple years now and he's the greatest to talk to on the phone, in person.

Boog Mopar