Should find it right on the oil filter to block adapter.
It's only a switch that closes it's contacts when it detects about 8 psi of oil pressure.
The dash gage is not a true oil pressure indication of varying pressue but just goes to a mid position when the switch closes.
Sorry he got taken for big bucks in labor and the cost of a pump and gaskets.
This should have been replaced first, just on cost alone.
All you need to do is measure for a short with a meter when the motor is running. If it is open, it's faulty.
Last edited by Bluegrass; 05-29-2010 at 02:58 AM.