PLEASE HELP!! No power, no relay, fuel pump constantly on.

[1991.pioneer.explorer]

 

[Pete M]

I can't see your video 

[1991.pioneer.explorer]

44 minutes ago, Pete M said:

I can't see your video 

[1991.pioneer.explorer]

47 minutes ago, Pete M said:

I can't see your video 

How about now? I posted again.

 

[Pete M]

still nope.  what are you linking to? 

[1991.pioneer.explorer]

Here's my problem.. I did a motor swap myself, and I got everything in and hooked up, when I connected the negative terminal to the battery post, fuel immediately started getting pumped to the injectors. Mind you the keys aren't even in the ignition nor is the switch in the on position by chance. I even took the relay out of the fuse box and it still ran. And if its a short, we all know how much of a pain in the @$$ following the fuel wiring is because it runs into the cab through a grommet under the driver seat. I'm not sure what to do, by no means am I a mechanic I just love my jeep and want to know how it works but I think It beat me this time.. I might let a real mechanic give it a look. 

[Pete M]

there's a thread about how to chase down a short in the link in my sig.  

[1991.pioneer.explorer]

3 minutes ago, Pete M said:

there's a thread about how to chase down a short in the link in my sig.  

I'll check it out, thank you.

[Pete M]

it might help if you included the year of the truck and which drivetrain you have.      you can put that info in your sig. 

[gogmorgo]

Does anything else have ghost power, or just the fuel pump?

Looks like you're running an HO setup. What year truck is it in and what fuel pump, etc, are you using?

Any chance you smashed the main wiring harness between the firewall and head when you put the new motor in? Or anywhere else? The other guess I have is the wires directly under the relay box. 

[Eagle]

9 hours ago, Pete M said:

it might help if you included the year of the truck and which drivetrain you have.      you can put that info in your sig. 

 

In this case, we need to know the year and model of the truck, plus the year and model of the donor swap, plus exactly what came from the original vehicle and what was swapped in with the donor motor. As you pulled the old motor, did you carefully mark each wire and connector to be sure everything went back together the same way it came apart?

[Ωhm]

When you set the condition for pump running, try removing each fuse to determine if pump shut off. This may give a clue to where short to voltage is.

[1991.pioneer.explorer]

1 hour ago, Eagle said:

 

In this case, we need to know the year and model of the truck, plus the year and model of the donor swap, plus exactly what came from the original vehicle and what was swapped in with the donor motor. As you pulled the old motor, did you carefully mark each wire and connector to be sure everything went back together the same way it came apart?

I have a 91 mj 4.0 high output, I believe the donor came from a 92 cherokee, same motor. It was just the block that was swapped. All the parts and brackets were taken off of the original and put onto donor. 

 

[carnuck]

Try unplugging the ignition switch on the column. That Bypasses a possible coincidental slider switch breaking. Is there aftermarket Radio or accessory wiring direct to battery? If it was an XJ, I’d wonder about the passive alarm system with a “chip” that came out for a few years. 

   Alternator shorting internally? Wires pinched between bell housing and motor or melted on driver’s side?