Bonneville V6-231 3.8L VIN 3 SFI (1988)
28 kPa of oil pressure and provides a second battery feed path to the fuel pump, If the relay fails, the pump will continue to run using the battery
feed supplied by the closed oil pressure switch. This step checks the oil pressure switch to be sure it provides battery feed to the fuel pump should
the pump relay fail. A failed pump relay will result in extended engine crank time, because of the time required to build enough oil pressure to close
the oil pressure switch and turn on the fuel pump. There may be instances when the relay has failed but the engine will not crank fast enough to
build enough oil pressure to close the switch. This or a faulty oil pressure switch can result in "Engine Cranks But Will Not Run".
Chart A-7 Fuel System Pressure Test
