Oil Pressure

[duzie]

My oil pressure gauge increases by 15 pounds when the heater blower motor is running. This occurs even if the engine is not running. I swapped the wires on the sending unit and that drove the gauge to the maximum pressure with the engine off. Any suggestions?

[xatudor]

It sounds like a bad earth. Try running an extra earth wire from the body of the blower directly to the battery's negative post and see if it fixes the issue.

[duzie]

Thank you very much. I changed the ground on the heater and wiper motor and that corrected the problem.

[Avalanche325]

That would have to be the first post ever with one opinion and situation resolved.:)

[xatudor]

Your welcome, glad it turned out to be a relatively easy fix.