Hey Scotty, I just posted my electrical problem on one of your youtube videos. I hope you can help. I have a 2000 Jeep Cherokee XJ. I have two electrical problems that I believe are related. 1. O2 sensor heater malfunction. I've checked all fuses and checked continuity of the power and ground wires, checked the O2 ground to the engine, even bought a new computer, and O2 sensors, the list goes on and on. I've discovered that when I detach the entire wire harness from the vehicle then plug everything back in, the problem stays away just long enough to pass inspection. 2. My dome light and radio pulse on and off in unison while driving. And I notice that my dome light is getting 2 volts on and off while the key is in the on position. Trust me I'm out there under the hood and under the vehicle every other night (plus have 3 kids so....) I'm really busy out there. It seems all of the grounds for the interior issues are inside the car. How can I check those grounds using your method of connecting one end of the meter to the battery? Thanks so much for any help!!!
Odds are the computer driver for the o2 heater is bad. You have a wiring short somewhere, learn how to load test both power and ground circuits with your meter