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The switch that runs the wipers, applies a ground to the wiper motor.
If you have 12V on the hot side of the motor, there must be something wrong with that ground connection.
There are two ground connections at the motor, one for slow speed and one for high speed. So try high speed just to test if that ground will work.
Intermittent applies a ground to the slow speed automatically. So try int also.
At the connector on the motor, you could apply your own ground wire.
Hope this helps.
Check under hood drivers side under large black cover.
*I know that on a 1994 Astro it is located under the hood on the
passenger side on the fire wall next to the wiper relay (both relays are
little black boxes with a wire plug on the bottom) up above the heater
blower motor, I hope this helps, Good Luck.
Cdkruhlak, Typically a relay would not cause this problem. My assumption would be that it is the actual motor of the wipers. However, the relays should be located right where the fusebox or may be on the passenger side under the hood. When you pull off the cover you should be able to see a relay labeled wipers. You can try replacing the relay to see if it gets fixed. However, I believe it is the actual motor.
Probably won't be a fuse just for the windshield wipers, rather a relay in the "relay" box or the 'power distribution box.' The box should be in the engine compartment, either mounted near the fire wall or next to one of the inner fenders. Black plastic box with a cover on it. Once you locate it, look inside the cover of the box or in your Operators Manual to find which relay is for the wipers or the wiper motor. Then to test that relay, turn your wipers on and put one finger on the relay and feel and listen to see if there is a 'clicking' sound in the relay. If not, the relay will need replaced. Should be less that $10 at your local auto parts store. (Also, this relay might have some other curcuits bundled in with it, so you may want to check to see if anything else is not working, like cig lighter, radio, 4 way flashers, etc.)
Possibility: Relays located in the IPM located inside the engine compartment. Front Wiper On/Off Relay. Front Wiper Hi/Low Relay, Horn Relay, and/or Accessory Relay
These Relays may be bad. Switch similiar size and type and check functions.
Let me know if this helped or not or if you need additional help. Good Luck!
My source says one primary & one secondary fuel pump relay. Primary is behind center of dash, on passenger side of A/C controls, in a relay block.
Secondary, is on firewall inside car, in front of center console. Hope that helps.