Quote:
Originally Posted by Olds64
You might want to pick up a factory service manual. Or at least a Chilton's guide. That will have a wiring diagram and will make electrical troubleshooting easier. If you check the ground and so forth just wire 12 V directly to the motor to see if your motor is working. If it works, and you know you have good ground then your power isn't getting to the motor for some reason.
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Don't waste your money on a Chiltons/Haynes/et al. Just get a CSM. Be aware that some years used a separate electrical manual. In 1982, for example, the wiring diagrams were a separate volume but in 1986 they are all in the CSM. I unfortunately don't know about 1985.
Also, be aware that GM wiper motors use a weird shunt winding system. The main winding on the motor gives you high speed. A reverse-wound shunt winding is energized in conjunction with the main winding to give you low speed. The shunt winding by itself is used to park the wipers.