Re: Lazy OIL psi gauge
If the sending unit connector has only 1 wire, it is in fact a low oil pressure switch. So indeed the indication should go to a fixed position when oil pressure is high enough, or just 0. If you ground the wire then its just the same as having 0 pressure, so its normal that the pointer stays at 0.
JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
Monroe Reflex shocks /
Pirelli Scorpion ATR 245/65/17/
Transgo reprogramming shiftkit.