need help blowing fuel pump fuse

[sandypants]

ok i replaced the sending unit with a new one. i also made sure the ground was good and tight against the frame. cleaned the frame and all. i took it on a test run drove a mile came back and pop. new fuse pop again as soon as it touches the fuse box. im on a time crunch before i leave to germany next mon so im trying to figure this out. do i just follow the wires or is there something else prone to failing. thanx jeff

 

[4X4HIGH]

Apparently you don't need help blowing a fuse (it's already doing that).

Seriously though, you have a dead short somewhere, time to start chasing wires.

 

[bot0611]

Sounds to me like a short some where, electric fuel pump, what brand, did you put the fuse holder, make sure both wires (+ and -) of the pump are connected correctly if so track the + wire to see were its taking its power from and id say look for voltage spikes

 

[sandypants]

yea i was afraid of this. perhaps it will be visible. just making sure there wasnt a relay or something prone to this. thanx guys

 

[Jason4x4]

i usually see the wires to the injector pinched under the air cleaner.

 

[bot0611]

yea i was afraid of this. perhaps it will be visible. just making sure there wasnt a relay or something prone to this. thanx guys

Are you using relays for the pump??

 

[sandypants]

no im using the stock set up i said relay as just a what ever term. sometimes peoples might point out somethin you just never new

 

[BoondocK5]

Here's the deal
go pull the fuel pump relay out on the firewall just inboard of the AC box mounted on the right side of the firewall under the hood.
Disconnect the fuel pump wiring from the fuel pump. This will isolate the wiring all the way back to the plug for the fuel pump.
Get a DVOM (Digital, Volt, Ohm, Meter) connect the black lead to a good known ground preferable the battery ground. You'll need a wiring diagram of that system (fuel system) check and make sure the hot lead that go back to fuel pump is not grounded, with the Ohm meter function.
With the pump unplugged and the relay unplugged the wiring should read out of limits (no connection) which means it's good.
If that checks out, check the relay, is it melted, or damaged in any way? if you study the diagram you can see how the relay works power it up with a spare piece of wire see if it is working as advertised. Do all this and check back...