How does the oil pressure sender work?
I notice that it has 2 wires coming out. One goes to ground on the back of the head and the other goes to the gauges. What kind of signal is the one wire sending out to the gauges? is it analog or just on/off? positive or negative?
I'm working on wiring for my race car and would like to be able to use the factory sender if possible for my custom gauges.


