There is a module mounted on a bracket in front of the A/C condenser towards the drivers side of the car. It's mounted right behind the front bumper. That module is a 1996 specific module, if it doesn't come off a 96 it won't work on your car. It controls the fuel pump, cooling fan, fuel injectors.... etc
It's a known failure point and it's even harder to find. Your only option is a junkyard but expect to pay good money if they know what they have. Make sure the part number is the same or it won't work.
Here is the part number: F6LF-14B239-BC