How do you bypass a Ford fuel pump relay ?

Question

I have a 89 Ford E150 5.0L fuel injected van with dual gas tanks
that has sat for 5 years.
It now has a no-start condition.
Fuel pumps are working, has compression and spark.
And, the injectors seem to be passing gas.
It has to be bad gas.
I want to empty the gas tank of all this old gas,
without having to drop the tanks.

I want to jumper the fuel pump relay
so that the fuel pump will run continuously without cranking the engine.
That way I can disconnect the fuel line and
pump the tank into buckets.

My question is ,
How do I jumper the relay?
Where is the relay and what does it look like?
What points get jumped to each other?


Thanks

Answer 1

Under the hood on passenger side, hanging on the firewall
The color of the wires are Orange w/lite blue, Yellow, Red, and Tan w/green . (4 wires)
With the key on; jumper the orange/blue wire with the yellow.
(Yellow is hot orange goes to the tank.)

Answer 2

The pump relay probably has 4 wires at the connector, 2 for the control circuit and 2 to power the pump. (There may be a schematic on the side of the relay.) The control circuit will have a ground wire and a wire that has power only when you turn the key to START.

The pump circuit has 2 wires, one that provides the power and is “hot” all the time, and the lead to the pump. Connect a jumper between the power lead and the pump wire.

If this is not you configuration, disregard. Btw, the disadvantage of using the pump(s) is you may pick up any water and garbage in the tanks thereby contaminating you pump(s), fuel filter, lines and rails. You might want to reconsider and look for a drain plug on the bottom of each tank.

Answer 3

No guaranties, but try to run a hot wire to the fuel pump fuse.