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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

INERTIA SWITCH

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Old Aug 8, 2025 | 06:37 PM
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littleredford69's Avatar
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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?
 
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Old Aug 8, 2025 | 08:19 PM
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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.
 
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Old Aug 8, 2025 | 08:39 PM
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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?
 
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Old Aug 8, 2025 | 11:27 PM
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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.

 
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