Re: Wiper Motor - Extreme mental capacity issues
The system depends on the wiper switch bracket getting a good ground from the dash ground strap that lays on the back of the dash board and is part of the harness ground to the headlight switch. Original dash plastic is very brittle and the screws in it holding the wiper switch may allow a poor connection.
This is for the 1970~1971 system, I believe the 1972 system has a wired ground through the plug, which is different.
On my '71, when I replaced my switch, I soldered a wire directly to the wiper switch bracket to give it a hardwired ground.
How may I help you?
1971 Monte Carlo SS454-496ci 600hp
1999 Trans Am-500hp
2003 Iszu Ascender XL Limited V8