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First of all you need to access the Engine Control Module (ECM) using suitable diagnostic equipment (VAS, VAG-COM or similar) connected to the data link connector of the car, in order to pull out all DTC's memored. DTC = Diagnostic Trouble Code. Then you will bu full informed about the root cause of the problem, and you will be able to repair & replace bad pieces and reset the ECM.
ford starts with #1 is pass front #2 is 2nd pass from front #3 is 3rd pass front # 4 is forth from pass front now i dont know if it is a v8 or v10 if it is a V8 THEN # 5 IS THE FRONT DRIVERS SIDE IF IT IS A V10 THEN #5 IS THE REAR PASSENGER SIDE
1. The will not start in park. This seems like the DTR ( digital Transmission Range ) Sensor on the side of the automatic trans is not making contact in the Park position. Quick test, wheel chock at least 2 sets of wheel on a level surface, with truck in park, and a friend pressing the brake pedal, have them turn the key to the run position. Wait for the theft light to go out, and on the starter motor relay on the firewall, apply +12 V to the small gauge wire ( orange or orange w/ a stripe of color on it ). The starter motor relay will have 2 large battery cable size wires, and a smaller 16 AWG orange ( w or w/o color stripe ) on it. If this starts the truck, the DTR is the problem.
The orange wire runs through the DTR, and will only allow power to the starter relay in park or neutral. You seem to have a problem with the park side of the sensor. It is on the driver's side of the trans, with a connector to it. Check the connector for water / corrosion prior to ordering a new one.
when you turn the ignition switch on, the gas pump relay should turn on and go off to pressurize the system. You can keep the car in neutral/park, get down as low as you can to the driver's floor board and reach up and turn the ignition switch to on [but not to the point that you actually allow the engine to turn over]. Repeat this step until you hear the relay and can actually feel the little black (box) that is actually performing an electromechanical switching.
Check here first----> , it is usually on a diagram within or near your fuse panel.
It is a start. Secondly, I'd check for any play/movement on your negative/positive terminals of your battery and starter motor. Should these be snug, loosen them and clean the terminals on your battery AND starter. This may be "stupid" and "obvious" to most but they don't do it and that is usually the main cause... even if it "appears good".