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Like the title says my fuel pump will run with the key on and the relay under the drivers
seat unplugged. I did a search but found nothing like this. The car is a 90 mustang 5.0 lx
5 sp but the computer in it is an a9p and from my understanding this is the computer for
an automatic. The car runs fine just makes no since why this happens. I just bought the
car about 3 weeks ago so its new to me. As far as I can tell it was a factory auto car that
has been converted to 5 sp. Any help would be great sorry for the long post just want to be
as informative as I can be.
 

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if you look at your wiring diagram you will see, there must be power getting there, so your pump feed from the relay, must be shorted to power.
 
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