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Old 05-28-2013, 04:56 PM   #1
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Join Date: May 2013
Location: Victory Mills
Region: New York
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wiring harness question

I am not sure if the engine swap done prior to me getting the car was done right or not or if the harness was changed either. I was told that 91-93 harness had the fuel pump relay under the seat??? that is where mine is but it wasn't being used, he had the pump wired directly from the fuse panel to a switch???? Which brings me to my other question of isn't it bad to have your fuel pump on all the time isnt that why there is a relay to turn it off after prime or what not? I have no clue but its my gyess as to why it turns on then off right?

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Old 06-02-2013, 09:11 PM   #2
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Posts: 583
bad, well, yes and no.. it will put more strain on the fuel pump and the fuel pressure regulator.

it will also run the alternator harder.

if I remember right there are 3 harnesses, and the mid year 92 and 93 have the fuel pump relay in the engine bay, all others are under the seat.

93 mustang notch
~450hp 331 stroker - Sold
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