Here are possible causes for the problem and a wiring schematic.
Wipers Do Not Operate In Any Position
1. Blown fuse No. 6 (30-amp) in dash fuse block.
2. Faulty wiper motor assembly.
3. Disconnected wiper linkage.
4. Faulty wiper switch.
5. Poor ground.
6. Check for open circuit in Green/Black wire.
7. Check for loose or disconnected terminals.
Saturday, October 20th, 2018 AT 10:23 AM