Originally Posted by clinebarger
I would start with checking the Inputs & Outputs at the Main Relay.....Using either a Power Probe or a Incandescent Test Light.
Terminal 1. Green/Yellow wire......Fuel Pump Control, The ECM provides a Ground on this circuit for Fuel Pump Relay coil control.
Terminal 2. Blue/White wire..........Crank Voltage Input, Provides Power with starter engaged.
Terminal 4. Yellow/Green wire......Fuel Pump Output, Provides Power to the Fuel Pump.
Terminal 3. Black Wire..................Ground for PFI Relay Coil.
Terminal 5. Black/Yellow wire........Ignition Power for PFI Relay Coil (FP Power also comes from this source)
Terminal 6. Yellow/Black wire........Output too ECM, Power to turn-on the ECM.
Terminal 7. Yellow/White wire........Battery Power PFI Relay.
See if your getting a Ground at Terminal #1 at the same time the check engine lamp is illuminated!
Going to need some help here
Are we checking the connector to the main relay and the main relay?
Are there any steps that we can follow?
Please advise