2.5L 24Valve DOHC engine. Need fuel pump wiring connection information.
I have the white/red fuel level okay; 2 black grounds; violet power has constant voltage with ignition on = does not shut off after 1-2 seconds.
There is a heavier gauge all red wire = no voltage.
Is the heavier gauge red wire the fuel pump power supply?
Does anyone have a schematic for this connection? All the wiring diagrams I have found only show 4 wires (2 black, white/red and violet/orange.
Help greatly appreciated..............
Black is ground and is the number 1 terminal on the plug.
The number 2 terminal appears to be empty.
Violet/Orange is for the inertia cutoff switch. It is number 3 terminal on the plug. It is also from the fuel pump relay.
Black/Blue is the number 4 terminal on the plug.
White/Red is for the fuel gauge. It is number 5 terminal on the plug.
These are the wires that appear on the plug for the fuel module.
Let us know if this works for you. The schematic only shows four wires.
Thanks guys for the information.
I went ahead and disassembled the entire pump unit and the connections noted by TechHelp2 is correct.
The "empty" terminal on the pigtail has an internal wire that is another ground. Need to check a few things but I think the heavier red wire in the "empty" terminal COULD be an earth ground (as opposed to circuit ground).
The internal pump itself uses violet/orange for power; other is negative.
I believe the problem is the wiring in the fuel pump housing is no good as the pump motor works okay connected directly across the battery.
No sense in trying to replace internal pump but replace entire pump/housing assembly.
Thought I could save $280 on part cost but isn't going to happen.
Found the problem. Inside the fuel pump cover the inner wiring actually has a connector on the outer pin connection. You wouldn't really notice it unless you stared at it good for a while. I managed to get this connector unhooked and there was the trouble.
The violet positive feed terminal connects to a pink connector down to the pump itself. Apparently the blended ethanol fuels used now corroded this connection. I cleaned it up and snapped it together and reinstalled the entire unit and all is okay.
The pump motor was okay so no replacement needed.
Good thing as the factory replacement entire unit (Carter part# P74954M) costs about $380. Not sure what a repair shop would attempt to replace but the Ford dealership would cost $200 for diagnosis and another $750 to replace. Figure in some tax and we're talking about a grand. My cost other than frustration equals zero.
Thanks for confirming my wiring diagram question; it set me looking in the correct location.