Help please..30amp main fuse under hood to fuel pump circuit blowing.

Fordfreak! · #1 (**permalink**) 04-26-2008, 10:50 AM

Hello everyone,newbee here.I have a 2001 e250 that keeps blowing the main 30amp fuse under the hood to the fuel pump circuit. I had a spare fuel pump and replace it too only have the same problem,the fuse blows right away. Does anyone know what else is on the fuel pump circuit? Maybe a diagram? Any help is apreciated. Thankyou.

Club Wagon · #2 (**permalink**) 04-26-2008, 03:18 PM

Can we presume you bench tested both fuel pumps?

I'd have tested the old pump to confirm it was the cause of the overload & tested the circuit w/pump disconnected to look for a short.

Fuel pump circuits are usually fairly direct, but feature a relay & rollover switch.

Fordfreak! · #3 (**permalink**) 04-26-2008, 04:33 PM

Thanks Club,i finally tracked it down to a dirty connection to the pcm.as crazy as it sounds i was disconnecting all sensors one at a time with the test light pluged in to show the short,disconnected the ignition and short went away so i the disconnected the pcm and short also went away,plugged the pcm in again and short was gone so i assumed it was just a bad connection,van runs great! 260,000 and still running strong,knock on wood.Forgot to mention i hard wired the fuel pump just to test it and it worked fine but truck had no spark also which is what led me to the pcm.