Fuel 89 5.0 Inertia Switch Vs 90+

AIbandit

Member
Aug 1, 2009
76
1
9
My inertia switch is disabling my fuel pump occasionally so I need to swap it out before it becomes permanent.

I have the old style with a white tab instead of the red button. I think there's 3 wires and the newer ones have 2 wires.

How can it be converted over?
 
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The 89 & 90 fuel pump circuits are the same, so the switch should be the same.

Fuel pump wiring diagram 87-90 5.0 Mustangs
87-90-5-0-mustang-fuel-pump-wiring-gif.88241