Good afternoon y'all, I have a '92 XLT 5.0 with dual fuel tanks. I installed a Roadfar fuel pump/sending unit in the front tank and I can't get it to work. I could use some guidance to make sure it's wired correctly as the pump came with zero instructions or wiring diagram. I've searched all over the net and cannot find any type of instructions/diagram.
he new pump came with a plug/socket on the end of its wiring harness, but nowhere on truck can one be found to plug it into the truck's harness - my truck does not have a plug/socket on its wiring loom. So I snipped the wires from the original terminal and spliced them onto the new pump terminal, one-by-one, making sure that I did not mix them up. For example, on the original terminal position 1 is orange and I made sure to splice the orange wire in the truck's loom to the new terminal's position 1 wire (black/white).

Original fuel pump terminal


New terminal


All wired up

I made sure the fuel line with in blue sleeve was attached to the larger of the two nipples on the top of the pump and the gray fuel line was on the smaller nipple. The truck will run off the rear tank just fine, but I checked the under-hood fuse anyway; it is fine.
Yes, there is gas in the front tank, about 5 gallons of fresh fuel.
Any assistance y'all can offer would be greatly appreciated.

 

This is the pump I bought. It says it's for the "midship" tank in one place, but as I look closer, it says rear somewhere else. In the reviews someone said they successfully used it in the front (midship) tank.


POSITION says rear VEHICLE SERVICE TYPE says midship

 

The OEM Part NumberF6TZ-9A407-AB is for the 17 gal midship tank, so it's the correct pump. That means the wiring MUST be off since the pump is correct and the fuel lines were hooked up correctly. Just need someone with experience/knowledge in replacing the pump to let me know if the wiring is indeed incorrect.

 

I read on another thread that when putting in a new fuel pump assembly (the original design is no longer available) you HAVE to install a Ford pigtail on the truck's wiring loom. I installed it yesterday and truck fired right up. Not sure what's inside that pigtail that tells the truck it's been installed, but it has something that does.

 

No, it doesn't.

 

a careful (very brief) bench test and a digital voltmeter when you change out a fuel pump takes the mystery and magic out of the equation. You can know before you put the new pump on and close everything back up whether or not the pump works, and whether or not you have good power and ground.

 

Hey there,
I've purchased a new fuel pump and I'm having the same issue! Would you send me a link or a speicfic part name for the "pigtail." Thanks!

 

if you have any luck send it my way please!!! I’m getting ready to do mine on my 92 5.0. Thanks!!!

 

It is the norm these days where you need to re wire every aftermarket pump
Figure it like they are all white wires (like a GM TR sensor connector comes) (all white wires)
There are only w 4 wires, and it is easy to figure out each one's function
If in doubt, simply compare each pump and wire accordingly, 2 for the pump motor and 2 for the sender
The pumps are labeled + and - at the top and the sender does not matter for polarity

 

Sorry, just now seeing this post. The pigtail is

WT56822