05 Ranger 3.0 V6 cranks but won’t start!

[ShhhhhDougsHere]

Here's what they look like.

If you can get them even if you don't use them on this job, which I'm sure you will, they are very handy.

My advice when trying to disassemble the connector is go slow and be careful.
If you use the pics and they slip, they will cut you. It might just be a scrape but it'll be a good one.
Take your time there's no hurry.
You've been without your truck this long.
One more day is not going to kill us.

I also suggest that you buy some electrical contact cleaner it's about $7 a bottle if I remember right.
I got mine at AutoZone.
A little brass bristle wire brush will come in handy too.

Once you have the connector apart holding the ends of the wires that actually connect to the pins on the fuel pump assembly won't be as easy.
Because they're small I would use some pliers or something but be careful not to break anything.

If you decide to reuse your old but still good fuel pump assembly,
Do your best to clean the pins on it that the wiring harness plug, plugs onto as well.

 

[ShhhhhDougsHere]

Here's what the electrical cleaner I bought looks like.

Notice the red hose that's attached to the lid.
It comes taped to the side.
I always try to look for whatever product I need that has that little hose.
I lose them a lot.
I find that little hoes helps because it makes it so you can spray directly on what you want to spray on and not everything else.

To me buying the pics and electrical cleaner is an investment in myself and my vehicle.
Cuz it allows me to help my vehicle make it lifespan a lot longer.

Once again I wish you luck.

 

[franklin2]

One warning. This scenario happens with lighting problems also. You unplug something, you get 12v. You plug it in, it doesn't work. You said you measured 6v with it plugged in. That is a sign you have a poor connection in the circuit somewhere. It could very well be the plug has a poor connection. But to be sure, you should back probe the connector, or poke the insulation through and test for voltage on the wires before they get to the plug. If you have 12v before the plug with the pump plugged in, but 6v after the plug WITH THE PUMP PLUGGED IN, then it is the plug.

If you only have 6v on the wiring before plug, with the plug plugged into the pump, then you have a problem up the line feeding the pump circuit.

Your meter takes very little current to make a reading. The pump on the other hand takes a lot of current to run. If there is a poor connection in the pump circuit, disconnecting the pump will give you the full 12v. Plugging the pump in will load down the circuit and make the problem apparent. So as you are testing with your meter, always keep the pump plugged in.