INERTIA SWITCH

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Aug 8, 2025 | 06:37 PM

littleredford69

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5th Wheeling

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INERTIA SWITCH

Looking at 1987 F150 300 4.9 EFI. I see pictures of inertia switch (shut off power for fuel pump for collision) located on fire wall and side panel, just how many switches our there?

Aug 8, 2025 | 08:19 PM

rla2005

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Joined: Oct 2005

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From: Kentucky

One inertia switch on the firewall near the brake pedal on your truck.

1992 and later the inertia switch is on the passenger side kick panel behind a piece of trim.

Aug 8, 2025 | 08:39 PM

littleredford69

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5th Wheeling

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Thanks, Just talk to my grandson wondering now about a check valve on boost pump,fuel level unit install in tank would cause lost of fuel at High Pressure fuel pump?

Aug 8, 2025 | 11:27 PM

My4Fordtrucks

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Joined: Jun 2015

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I answered this question in your other thread. What is a “check valve on boost pump?”

You should have kept using the other thread instead of starting a new one for the same issue.