So I decided to get around to installing the oil pressure sender and gauge a few weeks past. The install was pretty straight forward up into the point it came to wiring.

electrical is not my strong point, actually its a bit of a weakness.

removed the existing temp gauge in the center of our three gauge panel and starting taking some readings to determine a 12v power source.

I found the lighting wires at 12v, but the remaining 4 wires only read upto 5v ???

What gives ???

any advise or direction is highly appreciated.