Test J

PINPOINT TEST J: INCORRECT OIL PRESSURE GAUGE INDICATION

Test J1-J4:

Test J5-J6:

Normal Operation
The engine oil pressure switch is a normally open switch. When the oil pressure is within normal ranges, the engine oil pressure switch closes and sends a ground signal to the instrument cluster through circuit 31 (WH/RD) and commands the oil pressure gauge to the normal or mid-range position. When oil pressure is low the engine oil pressure switch opens, removing the ground signal, and the instrument cluster commands the oil pressure gauge to the L (low) position.

Possible Causes
- circuit 31 (WH/RD) open, short to ground or short to power
- engine oil pressure switch
- instrument cluster