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Holley terminator X fuel pump wiring help

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Old Mar 1, 2026 | 01:39 PM
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Holley terminator X fuel pump wiring help

Currently trying to install holley terminator X on my 1990 ford f150 5.0l, I can't seem to find the proper wiring diagram for my truck, fuel pump relay has red, yellow,orange and green/tan wires coming out of it. Trying to locate the proper tie in points to keep my factory dual tanks working. Thanks for the help
 
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Old Mar 1, 2026 | 03:40 PM
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Pin 22 (T/LG wire) on ecm harness is the fuel pump enable wire. That should be the trigger for the relay.
 
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Old Mar 1, 2026 | 03:45 PM
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https://www.ford-trucks.com/forums/1...or-switch.html Post two should help you thanks to @rla2005
 
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Old Mar 2, 2026 | 01:29 PM
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Awesome thanks!
 
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