Here we go........
I wanted a delay/ intermittent wiper control. I also needed to replace the switch anyways as it had no **** and only worked at hi speed. I got a 2fer deal on eBay for switches with the delay module. Playing musical chairs with the switches and modules, I get the wiper to work only occasionally, with no hi speed at all and a very sluggish operation in other modes. Using any switches ONLY, (without module) I still only get hi speed. Is it the consensus here that my wiper motor is screwed up? Thanks

 

I don't know if this will help but check it out.

Interval Windshield Wiper System "E" Motor Test


Quick Check

1. If wipers operate in high speed only and wipers hesitate when going through PARK position, connect jumper wire from windshield wiper switch case to ground.

2. If wipers now work in low speed, repair switch ground.

3. If wipers do not work in low speed with switch case grounded, replace Wiper Control Module.

 

Is the black module box supposed to be grounded as well?

 

No, it's plastic. Its ground is in its wiring harness. The switch body (for interval wipers ONLY) has an extra ground wire riveted to the case that MUST be attached to a true ground.

 

My motor was bad when it would turn on and not turn off