Wipers won't delay and won't park in correct spot

[hrc200x]

Truck is a '84 wiper switch on the blinker lever. After reading old posts figuring the delay problem is probably the module below the column, what could cause my wipers to park in the middle of the windshield? I don't have the wiper arms on but when I watch the round splines where they would go they seem to swipe down first for guessing 1/2 of the stroke, then back up, and they park in the middle every time. If I use the single wipe feature (turning the knob clockwise) very quickly and let off they wipe down just a bit and park. then hit the single swipe again they may go down just a tiny bit but for the most part it would be wiping up accross the windshield like it supposed to.

They park like they are supposed to, but its in the wrong spot. I've cleaned the connectors at the motor. I've also ohmed the wires from the left side of the delay module out to the motor + the one black I belive thats ground. The wiring all checked out that its good from the left side of the module to the motor.

What is the bolt for that sticks out of the case maybe 3/4"? In this auction you can see the bolt in the first picture at the far left side of the motor. http://www.ebay.com/itm/Windshield-w...r#ht_181wt_681

[Sodell]

I bet it's the delay control module, or the switch.

Be sure that the wiper motor housing has a good path to ground. And that the grounding strap that connects the top and bottom outboard bolts is not torn.

Brief description:

A permanent magnet type wiper is used on CK and G Series. The motor parts-field magnets, armature, drive gear etc. are enclosed in a two piece sheet metal housing. For purposes of explanation the housing halves are referred to as upper and lower housing. The two housings are attached to each other by ten extrusions which are staked over.

The wiper motor is protected by an automatic reset type circuit breaker located on the motor brush holder assembly. A fuse located in the fuse block protects the vehicle wiring.

The wiper motor can be operated only when the ignition switch is in the "run" or "accessory" position.

The wiper motor has three brushes; the "common" the low speed, and the high speed. When the ignition switch is "ON," power is applied to the common brush. The low speed and high speed brushes are connected to their respective ground via the control switch. When the control switch is positioned at "HI" or "LO" speed, a ground path is connected to the high or low speed brush in the motor. The motor runs at the switch selected speed.

In order to have the wiper blades stop in their normal park position and the wiper motor shut off properly, the motor must run in LO speed. When the control switch is moved to the OFF position, the low speed brush circuit goes through a park switch located in the gear housing and then to ground at the control switch. The park switch is normally closed and this allows the wiper to keep running. When the wiper blades reach their park position, the cam on the gear opens the normally closed park switch, which turns off the wiper.

[Sodell]

[IMG][/IMG]

[hrc200x]

How do I check the wiper motor housing path to ground? Pretty sure the grounding strap is ok.

What about that bolt that sticks out of the case? Is that some sort of adjustment?

Is there a way to test the delay module with a meter?

[hrc200x]

Can that image be made bigger?

[hatzie]

The column or dash switch and delay module switch the ground side of the circuit not the +12v. Any ground strap attached to the wiper motor is just noise suppression.

Not Parking is usually failure of the cam switches to stay engaged inside the motor itself.