ill post this again in here cause had no response in main forum.

well i knew i had low oil pressure but when i tap into the odometer instrument diagnostics, the oil pressure reading is zero and doesnt move an inch.

i want to know how to source out where the fault is, i have a brand new pressure switch installed btw.

I'm a noob when it comes to electronics and need to know how to test the voltage/resistance/whatever and what readings i should get from the oil pressure connector/ ecu pin (which pin?)) etc

as i was playing around and didnt know what i was doing, i put black to an earth point and red to the connector and it gave 0.02 mV .. Am i even close??



also, is the only way to test a MAP sensor to backprobe the sensor with the car running?? thankss alot.

i think its the gauge they can build a resitance i had same problem best idea is an after market mechanical one.