Is there a way to test pump delivery pressure sensor ? and wiring harness ?
The sensor should have a 5v feed to pin 1 and a gnd to pin 3. Pin 2 is the signal wire. You should be looking for around 4.5-5v at pin 1, a good gnd on pin 3 and with ign on around 1v or more from pin 2. Get some one to increase pump pressure and the pin 2 voltage should rise steady