Federal Vehicles

C.O. Potentiometer:

1. With the ignition "OFF", remove the electrical connector at the CO potentiometer.
2. Connect volt/ohm meter between terminal 1 and 3 of the CO potentiometer plug and measure the resistance.

^ The correct measurement should be approx. 0 to 2 ohms.

If the correct measurements are not obtained, the CO potentiometer is defective. Replace the CO potentiometer.