I purchased a 1992 XLT,351W,EFI Bronco about 5 years ago. It run perfect. I drove it for a few years and parked it. It sat about 2 years. I bought a battery and starter solenoid, started it up, run like I never parked it. Changed the oil and filter. A couple weeks go by, I start it up, let it idle so the battery will stay charged, go and wash my '78 Bronco, It DIES. Shuts off. No warning, no spit and sputter, no nothing. I open the driver side door, I could see smoke under the dash and smell wire insulation burning. Turned the ignition off, disconnected the battery, therefore erasing the codes. I let it sit for a few weeks, bought a Haynes manual, started trouble shooting the wiring under the hood and under the dash. When I turn the ignition on, I don't here the fuel pump, and when I check for fire at the coil, there is none. I've checked ( with an Ohmmeter ) the Ignition module, the PIP signal in and out, the coil, the fuses under the hood and under the dash, the relays, the wiring harness going through the fire wall and everywhere else the manual said to check, and everything checks OK. I took the Ignition module to Advance Auto, it checked OK. If I ground the fuel pump through the DLC connector, it will work. I've unplugged every component under the dash that had wires connected to it, there was no burnt smell, or melted wires on any of them. I removed the upper intake manifold to check for chewed wires going to the fuel injectors, and wiring harness ( due to a mouse living under the hood ) no chewed wires, just alittle of the black tape thats around the black plastic wire covers. I've searched for three weekends in a rowe for a fix, and now I'm out of options. I'm stumped. I've read on here that the computers rarely go out. Is this true? If not, where is it located? Under the dash or passenger side kick panel? I think the electronic shift module is located behind the passenger side kick panel. I'm not positive. Is there anything elseI could try? Any and all help will be greatly appreciated. This is the second time I've typed this, so if it posts twice I apologize. Thanks Alot

 

So, you have exhausted every option....hmmm. Well EEC computers don't fail very often thats for certain but if you are suspicious that something has happened to it, its behind the pass. side kick panel with the shift control module. You CAN test for a defective ECA (which will test for a dead MLPS as well). The LT. BLUE/YELLOW wire running to the MLPS (Manual Lever Positioning Sensor) should carry 0 volts in Park or Neutral with the key ON. In ANY "moving" gear it should carry 12 volts or whatever the battery voltage reads. Check this and if the wire has no voltage in moving gears, disconnect the MLPS at the connector and check the voltage again. If the voltage is present, the MLPS is bad, if not,trace the wire back to pin 30 of the ECA and check for battery voltage at pin 30. If there is still no voltage present, the ECA's internal power supply has gone the way of the Dodo and the ECA must be replaced. I have posted this info once before and was very reluctant to do so because this is a "VERY LAST RESORT" test. The ECA does NOT fail that often and every other possibility should be completely exhausted before performing this test.

 

You said the fuel pump is not running, have you checked the inertia switch (behind passanger side kick panel)?