No power on C = no power to the wiper motor. The logic board on the motor uses the power from C to activate the motor based on the inputs from the other pins.
You need a good ground on PIN B
Battery voltage through a 25 amp fuse to PIN C
Now the other pins are the controls.
Turn the wiper switch to HIGH and you should get battery voltage on PIN D
Now for low speed constant wipe it should show battery voltage on PIN E.
If you switch to the intermittent/pulse wiper function the voltage on PIN E will go lower as the intermittent wipe interval gets longer.
For the washers function it applies battery voltage at PIN A and also turns on the washer pump in the bottle. When you press only the washer function with the wipers OFF the wipers will sweep and return to park as long as you are holding the washers on. When the wipers are ON the washer function only triggers the washer pump and the signal on PIN A is ignored.
To test the wiper motor and verify it works is easy. Disconnect the plug. Run a jumper wire from battery negative to PIN B on the motor, Run a 25 amp fused jumper wire to PIN C on the motor.
Now take a short jumper and apply battery voltage to the various motor side pins to test the functions
Voltage to PIN D and the motor should come on at high speed.
Voltage to PIN E and you should get low speed wiper.
Voltage to PIN A and you should get 1-3 sweeps and back to park. (Depends on the actual motor logic)
Hope that helps.
Sunday, May 6th, 2018 AT 8:04 AM