M1009 wiper motor ground

[kipman]

Check the search some, nothing found as to my problem, wipers quit, put back up wiper motor in and work fine for two minutes,then nothing, so I am asking where is the ground for the wiper motor?

 

[doghead]

Schematic F-20 in the -20 shows the wiper motor circuit. It looks like the purple wire(wire number 92) in the 3 wire plug, is the ground. It goes through the switch on the column. The actual ground is made with wire number 150(black) in the column wiring under the dash.

There does appear to be a thermal overload breaker built into the motor. Are your wipers or linkages binding?

 

[onegmjack]

On some Gm truck wiper motor has a circuit board and the soilder joint come loose.Can heat joint with soildering iron ,most the time fixes the problem.Don,t know if this is the problem with yours but worth a visial inspection.

 

[kipman]

Doghead came through as expected, I will check the switch and ground soon after I finish picking up my 15000 pounds of parachutes.