[mike y]

How does it work? It starts at the sender with 1 wire when you get to the gage you have 3 wires, mine pegs out when you turn the key on same thing when running. HELP this is 91 stock mustang. Thanks Mike

 

[bk347]

Mine in the spec car does the same thing. We'll have to wait for the electronic gurus to repsond. The three wires at the gauge end I believe are ground, pos feed and sender. Bob

 

[bk347]

I had my gauge hooked up to a "light" sender. With key on the sender grounds until oil pressure un seats it. For a gauge you need the bigger sender so pressure will register on the gauge. Hope this helps, Bob