Fuel pump relay location

skykeith said

You are correct about the Fords wiring the enertia switch into the pump power wire. What I should have said was some after market fuel pumps pull more current than a stock Ford and I've never known what the max current rating is for the switch, so I wire them into the control side.

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I suggested what most OEM use, which is an Inertia switch in the Kick panel or in the trunk area wired in-line with the power feed of the relay. The Inertia switch is capable of a 20 amp circuit which is good to handle most any high performance fuel pump. You would just have to check the rating of the fuel pump you are running. OEM isn't putting Inertia switches in the trunk area and running control side wiring back there , plus pump feed wiring for a reason, just not needed.

You can get a High performance pump that pulls less than 15 amps good for over 700hp, So you just need to check what your pump uses.

http://realstreetperformance.com/Fuel-Pump-Comparison-Test.html