- Joined
- Aug 13, 2007
- Messages
- 112
- Reaction score
- 1
- Points
- 0
- Vehicle Year
- 1990
- Make / Model
- Ranger
- Transmission
- Automatic
Does anyone know how the wiper speed is regulated on a 1990 ranger? I have removed all the stock wiring harness from the truck and want to wire in high and low speed with a 3-way toggle. I tested the four wires going to the wiper motor. By grounding the white wire and sending 12V to the blue/red wire I get high speed. I cannot get any other movement by any other combination of the four wires. Can anyone provide some insight?