I would like to get the ECM wiring diagram because I purchase a new ECM and i transferred the Prom to the new ECM but the ECM still not activating pin 85 of the fuel pump relay.
I would like to note that the relay will only activate for 2 seconds. The Fuel Pump Relay is energized for 2 seconds after the ignition switch is turned to “RUN” or as long as the ECM senses ignition pulses. So if the battery voltage is there for the initial 2 seconds and then is lost, this is normal. You may need to look at why the ECM is not getting engine pulse signal. Check the fuses and wiring if you are not getting battery voltage for the initial 2 seconds.
1993 Cadillac Fleetwood Fuel Pump Wiring Diagram
