Hello group. It's been a while since I've posted but new problems seem to crop up. I have installed a trio of aftermarket gauges to monitor engine activity out back. Following the manufacturer's instructions has been a bit troublesome. Engine is currently not firing (intentionally) while I try to test oil pressure gauge. I got the handy oil pressure gauge with the idiot light and pressure sensor all-in-one. The Speedo lights are wired hot just like the regular idiot light. Generator light works just fine. Tested the OP bulb and it lights. Oil pressure Idiot light does not light. I am reading 12V at the oil pressure switch out back so I thought it was a grounding issue. Ground strap is tight. I can make the OP light work by removing it from the sensor in the case and grounding it to the alternator nut with alligator clips. What gives? If I am pulling 12V from the front of the car why wouldn't the OP sensor ground to the case? There is obviously a fundamental element I am overlooking so maybe a fresh set of ears can help out. Thanks for any help. At this point it IS appreciated.
PS. I do have oil pressure b/c I removed the sensor and cranked the engine. It is pushing oil through. Engine was recently re-installed but I haven't tried to fire it until I work this bugger out.