wiring diagrams are a crucial tool to diagnose these issues. By using this wiring diagram I was able to rule out areas that were not effected. I knew I had ground circuit fault on both banks but I didn’t know where.
By using this diagram and my volt meter I was able to rule out segments of the ground circuit. Because all of circuits before splice 162 tested good at 0.3 ohms of resistance and the ground circuit on the RH sensor was testing at 1k ohms and the ground at the LH sensor was also 1k ohms.
But when I tested the ground wire between both sensors through splice 149 tested at 0.3 ohms I knew problem had to be at splice 162 or between splices 162 and 149. Once I had that location narrowed down I inspected that part of the harness and found my fault.
Hopefully sharing this process will help others in breaking down a circuit to find the location of wiring faults
By using this diagram and my volt meter I was able to rule out segments of the ground circuit. Because all of circuits before splice 162 tested good at 0.3 ohms of resistance and the ground circuit on the RH sensor was testing at 1k ohms and the ground at the LH sensor was also 1k ohms.
But when I tested the ground wire between both sensors through splice 149 tested at 0.3 ohms I knew problem had to be at splice 162 or between splices 162 and 149. Once I had that location narrowed down I inspected that part of the harness and found my fault.
Hopefully sharing this process will help others in breaking down a circuit to find the location of wiring faults