!986 f150 parked one day has not started since new fuel pump relay good no power to pumps

Maybe this will help. It’s comparatively simple to follow. Notice on the left side a “To Test Conn Pin 6” notation with a tan/light green wire. That is a splice and with the key on if you run a wire from that connector (located by the diagnostic connector) to ground you should hear the fuel pump run…

What a great diagram illustrating all the possibilities. There’s at least 6 components (besides the pump relay) that could be causing the pump not to run. Plus the wiring and connector at the pump that was replaced. The check via diag connector is great first step. I would also check the inertia swi…

Kudos to @ok4450 for the diagram. Wow, three fuel pumps. I suspect that if the inertia switch isn’t causing the trouble then a blown fusible link will be found.

1986 Ford F-150 hasn’t started since fuel pump replacement

Maintenance/Repairs

TwinTurbo September 9, 2020, 2:47am 2

Better trace power back from pumps to relay then

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1986 Ford F-150 hasn’t started since fuel pump replacement

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