I have a 93 ranger supercab XLT.
My wipers work fine in low/high speeds but won't return to starting position when I turn the wiper's off.
When I'm in intermittent mode's, the wiper's goes across the windshield a few inche's at a time and hang up in one position often till I do a on/off with wiper switch several time's. By doing that I eventually will get the wiper across and back to the start. I also can turn high/low speed mode to get it back to starting position but I have to turn them off quickly or they'll begin going to other direction again.
Could this be a park switch problem? And would that mean I would have to replace the motor? Or what could it be?
Thank's for any help........Ken

 

It does sound like a park switch problem.

How The Circuit Works


The Interval Wiper/Washer allows the driver to select LO speed, HI speed or Interval wipe. With the wipers in the interval position, wipes are spaced two to fifteen seconds apart.

The Multi-function Switch has a momentary Washer Switch, a four-position Wiper Switch and a Variable Resistor, which sets interval time.

Washer Operation
Pushing the wiper/washer control **** sends current from Circuit Breaker 2 through the Washer Switch to the Windshield Washer Pump and Interval Governor. Normal wiping action occurs during washing when the Wiper Switch is in LO or HI. If the Wiper Switch is in OFF or INT, Interval Override operates the Electronic Switch and the Governor Relay to apply power to terminal L of the Wiper Motor; the wipers operate in low speed. When the Washer Button is released, low speed operation continues for several cycles to dry off the windshield. The wipers then return to OFF or INT operation.

LO/HI Speed Wiper Operation
When the Wiper Switch is in the LO (or HI) position, section A of the Wiper Switch powers the interval override so that the Electronic Switch and the Interval Governor Relay are pulled in continuously. Wiper Motor current then flows through Circuit Breaker 2 and the energized contacts of the Interval Governor Relay to the L terminal of the Wiper Motor. Power is applied to the H terminal of the Wiper Motor through section B of the Wiper Switch for high speed operation.

Interval Wiper Operation
During Interval operation, the wipers make single wipes at low speed separated by a variable length pause.

When first switched to INT position, section B of the Wiper Switch activates the Interval Timer. The Interval Timer momentarily closes the Electronic Switch, energizing the Interval Governor Relay. Current flows to the Wiper Motor L terminal through the energized contacts of the Interval Governor Relay. Ground is connected to terminal C of the Wiper Motor.

As the Wiper Motor turns, the Wiper Motor Switch changes from the grounded PARK position to the hot RUN position. Current now flows through the 63 (R) wire and the RUN contact of the Wiper Motor Switch, and resets the interval timer, which opens the Electronic Switch. The current path continues through the deenergized Interval Governor Relay contact to the L terminal of the Wiper Motor. Wiping continues until the final wipe is completed. The Wiper Motor Switch returns to the PARK position contact, which is grounded, and the Wiper Motor stops. After a pause (controlled by the variable resistor), the Interval Timer pulls in the Interval Governor Relay to start another wipe.

 

Thank's kioolt for the advice.
Unfortunately some of it went over my head as I am very new to the working's of the wiper system. I've done alot of searching and also checked alldata about service tips. So I now have a few thing's to try. It might be the governor, wiper switch, or motor itself. I will have to do the test's to eliminate what it might be.
Has anyone else had any experience's with their wiper's like this one?
Thank's again for the help......Ken