Quoting: philoldsmobile
Testing the relay is dead simple. turn the ignition on, and listen for the whirr of the fuel pump priming. no whirr = no fuel pump.
Reconnected the battery and after spending 5 minutes being deafened I managed to turn the clifford alarm off
When the ignition is turned on I can hear the fuel pump priming for a few seconds
I then checked every single electrical function and everything works OK, I was pleased to find that the radio and CD player still work after disconnecting the power, because I've never had the code card
But still the old Gal cranks like a good un but won't fire
I repeat there are no OBD2 fault or alarm codes, so my money is still on the VATS unit
According to the GM manual if there is a problem with the key resistance, the security light will illuminate for 3 minutes ( even after switching off ) or flash every second.
Mine comes on at light check for 5 seconds and then goes out, so my current ( pun intended ) suggestion is that the VATS unit is fine with the resistor value, but is not sending the 30Hz signal to the PCM to fire the fuel injectors
Any ideas people