Contour Enthusiasts Group Archives Forums General Troubleshooting Yeah, but where's the ground?

Can you confirm the wire colors I mentioned since I'm unable to make sense of your voltage readings.
If you are measuring power in to solenoid then battery voltage should be measured at all times. If measuring out from solenoid to PCM then you should measure bat volts when PCM is not providing ground path (assuming zero PCM leakage) and the voltage drop across PCM when it is conducting to ground.