Code E20: Fuel Fuse Blown: Notes
WARNING: This page is about a different car, the 1990 Cadillac Fleetwood and 1990 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Test numbers refer to test numbers on diagnostic chart.
Test Number 1) Test Number Check for open or short to ground on circuit No. 139.
Test Number 2) Check for short to ground on circuit No. 120.
Test Number 3) If light is on steady, non-switched portion of fuel pump circuit is shorted.
Test Number 4) Check for ECM shorting circuit No. 120 to ground.
Test Number 5) Check for pinched wires inside fuel tank.
Test Number 6) Measure resistance of fuel pump circuit inside fuel tank.
Test Number 7) Check for circuit No. 120 shorted to ground.
Test Number 8) Wire harness shorted to ground. Check for pinched or grounded wires at fuel pump prime test point, oil pressure switch and fuel pump connectors.