I am not an electrician by any means so I'm stumped. I did notice put will run without connecting ground just hot? Grounded through fuel level sender??? The other problem is I can't communicate with anti theft derrent module. No idea if this can have anything to do with pump problem. I would think so since I'm connecting battery power through the rely ports.

 

It sure does. It immobilizes the vehicle by disabling fuel.

 

Ok so I need to chase after that problem first? Just a side not I just used a fully charged battery and hooked up pump positive and negative directly to it and same results. How can the computer comunicate with pump? Through fuel level sending wires?

 

if the pump doesn't work directly connected then it's dead.

 

How much current is the pump drawing when you hook it directly to the battery? It should be on the order of 10 amps.

What brand(s) of fuel pump have you been getting?