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And, I was referring to hooking the pump up to a battery for testing. Using the fuse for a jumper was a great idea however. It proved the problem was downstream.
The 20 amp fuse in the box under the hood for the fuel pump had blown. I checked, 20 amp is what it calls for, so that was correct, altho seems a little large for a fuel pump to me.
Me, too. Especially, if they were going to be so cheap to put wires and connectors in there that will not handle a 20 amp short. Arcing in a fuel tank is not good at all.
Well, O'reillys is going to replace the whole assembly. $275.00 worth. Still not for sure its the pump that caused it tho. Cant find anything really wrong with any wires anywhere else. I think I should replace the 20 amp fuse with a 10 amp in case theres still a problem when I put it back together. Hopefully that will blow before wires start melting.
Well, this is weird. Their computer shows that this is the correct part, altho it has a fuel pressure regulator on it. Mine didnt. They dont even show a 99 Ranger as having a fuel pressure regulator at all. We didnt figure it would hurt anything, so guess Ill go with it. Thoughts?
Still have not fixed the truck. Found a bad connection in one of the partially melted wires going to the inertia switch. Also, the red button seems awfully floppy in that switch. You can push it down, but it just seems rattly and turn it upside down and the red button will just flop down. Just doesnt "feel" right. Bigger concern is a continuous half amp draw on the battery. Tank is still sitting on the ground, no pump hooked up yet. Charged the battery and put it on the truck this morning. By this afternoon, it was already down to 10.5 volts just sitting. Me and a friend hooked up my multimeter in series with the battery and he pulled fuses one at a time. Found 3 that would drop it from a half amp to a quarter amp draw. None were really "critical" fuses. Cigarette lighter, audio system, back up lights. Strange. Havent found any other melted wires, but they could easily be in a hidden place, if any. Thoughts?Still no progress on this truck. Im getting power as far as the inertia switch, but no way to tell if the switch is bad. Id just jumper it, but theres 3 wires. Whats the third one for? 
assembly installed. Had to go to Pull-A-Part and get another inertia switch as the old one was a lil melty and bad. Im pumping fuel now, no problem. But now I have no spark at the spark plug wires. So something else must have melted when it all went bad. I had the truck running (roughly) a little bit just before the fuel pump wires melted in two 3 weeks ago. 
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