Wiring diagram for water pump pressure switch best funky pressure. It came with every other wire just not the 3 wire plug/wiring for the oil pressure sensor. Pin oleh Margaret M. Wheeler di electrical wiring diagram The harness was cut when i got it. Oil pressure switch wiring diagram . Here are the instructions on how to wire an oil pressure gauge. I have a 87 s10 with a 99 5.7 vortec/ engine harness. Assortment of autometer oil pressure gauge wiring diagram. Headlight relay, fan relay, water temperature switch, back up light switch, a/c relay, main relay, oil pressure switch, water temperature sender, back up light switch, neutral start switch. Oil pressure switch wiring diagram source: Manual says oil pressure switch is a secondary circuit for fuel pump but i cannot locate the oil pressure switch. Wiring diagram for pressure switch best poe wiring diagram unique. Reset is possible only after a pressure drop of respectively 43 psi ( bar). In this diagram the low...