I have a 1990 Ford ranger 4.0 it will turn over but not start. It keep blowing the eec fuse and shutting off power to the fuel pump. I replaced both the eec and fuel pump relay. Any info would help

I believe it's in the underhood fuse panel. When you take the cover off, there is probably a diagram inside the cover.

Take it to a ASE certified repair shop . No one on here is going to know with out looking at it , How do we know what was rewired an how they did it, who rewired it ? You don't mess with things if your not sure what an how they work ! . It blows fuse # 1 in the power distribution box ? This is the fuel pump fuse ! What solenoid ? or do you mean a relay ? fuel pump relay ?

Do you know for a fact the pump relay is failing to send power to the pump ? ?
Have you checked the EEC relay ?

I would suspect a bad eec relay. These used to go out commonly, and the eec relay is what powers up the fuel pump relay.

Try a new relay first. This may not be good news if that does not work. If you can find the EEC (computer) and unplug it, then replace the fuse-if it blows you have another cheaper part on the circuit thats bad.
If the fuse does not blow, then the EEC must be shorted.
If you have to replace the EEC you may find a kindly dealer with a cash-for-clunker sitting there to violate. Salvage yards have them, Ebay sells them. I have seen them at swap meets for $20. They are a high price part even rebuilt at Dealers or autoparts stores.

1994 econoline fuel system electrical

Vehicle Application Escort/Tracer, Crown Victoria/Grand Marquis, Thunderbird/Cougar, Town Car, 5.0L Mustang, Aerostar, Ranger, Explorer, E-Series and Bronco.

1. The electrical circuit of the Inertia Fuel Shutoff (IFS) switch may vary per engine/vehicle application.
2. Inertia Fuel Shutoff (IFS) switch with fuel reset light (F-Series and Bronco).
3. Inertia Fuel Shutoff (IFS) switch with fuel reset light (Town Car).

Fuel Pump Circuit Operation When the ignition is switched to the ON position, it turns the EEC Power Relay on. The EEC Power Relay provides power to the EEC-IV processor and the control side of the fuel pump relay. Power for the fuel pump is supplied through a fuse link or high current fuse attached to the starter solenoid (battery side). From the fuse link or high current fuse, current flow is through the fuel pump relay and Inertia Fuel Shutoff (IFS) switch to the fuel pump. The IFS switch is a safety device used to shut off the fuel pump in the event of a collision. If the IFS switch is "tripped," it must be reset by depressing the white or red button on the top of the switch. The fuel pump relay is controlled by the Powertrain Control Module (PCM).
When the ignition switch is turned to the ON position, the fuel pump will operate. If the ignition switch is not turned to the START position, the PCM will shut the fuel pump off after approximately one second. The PCM will operate the fuel pump when the ignition is in the START position to provide fuel while cranking.
After the engine starts, the PCM will continue to operate the fuel pump unless the engine stops, engine speed drops below 120 rpm, or the IFS switch is "tripped."

System Diagnosis Note: Grounding the FP lead at the DLC will allow the pump to run continuously with the ignition switch on.

first thing is check the eec relay its near the battery next to the fuel pump relay one is gray other is brown

Fusible links will be under hood off of selonide, you will need test light to check because they will not always be obvious.

check near the battery, the ground wire may have come loose or is not making good contact

sounds like you got a short try tracing harness to see if theres anything visible