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Oops, Didn’t forget the double tap…

what we are talking about here is the gauge sender, that provides the info to drive the oil pressure gauge. I still have the 15 PSI low oil pressure switch in place driving its normal idiot light and alt excite relay K11…

Removed the oil sender. I prefer long sweep gauges personally(270+ sweep), most electric gauges are short sweep(90-180 deg). Overall I have had better luck with mechanical gauges over the year…

The gauge sender provides a variable resistance to ground based on the pressure it sees, so you can connect tgat srnder lead to ground thru a resistor and you should see a different reading on the meter. I forgwt what ohm.range we run. Replaced mine with a mechanical gauge:)

Sounds like sending unit problem. The 15psi oil pressure idiot light sw is a separate switch plumbed to the same oil manifold...