Originally Posted by
Egyorko
- With no wiper motor plugged in, I measured the voltage at pin 1 of the BCM. Voltage was ~12V for roughly the same amount of the time it took for the 7-8 cycles, then went to zero, consistent with the behavior of the wipers when plugged in..
Pin 1 of which connector? Pin 1 of C2 (as well as pin 2 of C2) should be HIGH along with pin 41 anytime the key is "ON". When you turn the wipers "on" one or both of pins 1 and 2 should go low, that is how I read the diagram. Those are switched grounds.
My first thougth was you have a bad "park" switch in the wiper motor, but since you changed it and it still did it, I'd say that's not the cause. YOu have proven the MF switch is OK.
I cannot think of any other function of the BCM that would activate the wiper motor.
Here is a question for YOU: How do you read the diagram? Does the motor's park switch MAKE or BREAK the connection from pins 41 and 40 when the wipers reach the 'Park' position?
Do you see any change of state on pin 40 that coincides with the wipers turning off?
This is an odd one.