Controller isn't heating up the sensor.

Hooked it up tonight. Ran a multimeter test on pins #6 and 7 (set mm to 50 vdc for resolution. Black on pin #6, red on #7). Reading was 10volts. Supposed to be at least 11 to heat the sensor. I don't understand why it's so low because the controller is connected directly to the car battery.

Anyhow, hooked up entire system w/o turning the car on and the same old thing happened. Red light was on, nice and bright, then hooked in circular sensor wire to the controller and the light went out. Took it off, red light back on nice and bright.

Any help would be appreciated.