76 corvette has new oil pressure gauge and new sending unit. Registers 0 with the wire grounded. Not grounded it pegs out. When you start the motor gauge pegs out.
new gauge and sending unit. When starting the motor the gauge pegs out and
stays pegged when the motor is off. When turning the switch back on it goes to
0. Then start it and it pegs out. Gronded the sending unit with no change.