does this sound right???????- locate your Cam Position Sensor and unplug the harness from it. The harness has 3 terminals. With a volt meter, check for at least 4.5V across terminals #1 and #3. Ignition should be on, engine not running. If you get min of 4.5V, then replace the CPS. If you don't get a voltage reading, then start checking all of your fuses. Then you will need to get a wiring diagram for your car and check the 3 wires for the CPS up to the ECM (not fun). If you have a open ciruit in one of the wires, run an overlay. If all wires check out good, time for a ECM. how can a harness with voltage tell me if a sensor is bad? with nothing plugged into it?