Originally Posted by J33P'r
I have AMC360, I've located my oil pressure sending unit (Im pretty sure thats it) one post terminal, how can I test it to see if its sending info to the guage? my guage does NOT work at all, so i dontknow if its the sending unit or the guage... and I want to troubleshoot it
all single wire senders (whether oil, temp, fuel, etc.) have 12V applied to the gauge, and the ground is provided through the sensor's single wire. When a complete
ground (meaning good ground with no resistance value) is applied to the single wire from the sensor, the guage "pegs" out with it's highest reading. So, if you supply the sensor wire with a solid ground and your gauge reads it's highest reading, you can be reasonably sure that the gauge is working, and that the wiring is okay.