1998 7.4GiPBYCCE Ser no. 4110158142
Had boat idling the other day and engine stopped. Attempted to restart and noticed fuel pumps not running.
Have bench tested as good both ignition and fuel pump relays.
Checked for power on fuel pump socket pins 30 and 86. Both had power.
Checked power on ignition relay socket pin 30 had power.
Jumped pin 30 to 87 on fuel pump relay socket and pumps both run.
Replaced relays and bumped ignition; fuel pumps did not run.
Removed relays and checked ignition relay pin 86 with ignition on had power.
Curiously, rechecked other pins, had power at fuel pump relay pin 30, but no power at pin 86, also now no power at ignition relay pin 30. Still had power at ignition pin 86 with ignition on.
There is power on both sides of all three engine circuit breakers by main plug (50, 12.5, and 50 amps) and fuel pump circuit breaker.
Engine safety kill switch appears operative; check that switch functioned open/closed at the harness connector under dash.
Thoughts for next step? Not sure what would interrupt power to fuel pump pin 86 and ignition pin 30.
Had boat idling the other day and engine stopped. Attempted to restart and noticed fuel pumps not running.
Have bench tested as good both ignition and fuel pump relays.
Checked for power on fuel pump socket pins 30 and 86. Both had power.
Checked power on ignition relay socket pin 30 had power.
Jumped pin 30 to 87 on fuel pump relay socket and pumps both run.
Replaced relays and bumped ignition; fuel pumps did not run.
Removed relays and checked ignition relay pin 86 with ignition on had power.
Curiously, rechecked other pins, had power at fuel pump relay pin 30, but no power at pin 86, also now no power at ignition relay pin 30. Still had power at ignition pin 86 with ignition on.
There is power on both sides of all three engine circuit breakers by main plug (50, 12.5, and 50 amps) and fuel pump circuit breaker.
Engine safety kill switch appears operative; check that switch functioned open/closed at the harness connector under dash.
Thoughts for next step? Not sure what would interrupt power to fuel pump pin 86 and ignition pin 30.