Try checking the cylanoid both on the starter and at the battery they maybe bad. I changed mine to and make sure it isn't shorted out and wired correctly
chances are it could be ignition timing
The ignition turns the car's electrical system on or off, in addition to starting the engine.
you don't have a 5.3L in the bronco. If it is indeed an Eddie Bauer then it should be a 5.8L, but other options include 5.0L and 4.9L.
The key and the ignition lock are badly worn. Try a different key if it doesn't fix it you need to replace the ignition lock.
Replace the ignition module and see if that don't fix your problem.
sounds like the ignition timing is off.
It is very possibly the ignition switch but there are certainly other possibilities as well. In any case, you'll need to learn some electrical diagnostic skills. The ignition switch appears faulty.
check the door switch
i have a 1984 bronco 2 and the ignition control mod went bad on it. It turned over but had no spark. The part was about 40 dollars and is located on the distributor. It takes a special tool to take it off. I changed mine and it started first try.
There is a fuel pump relay underneath the fuse box in the pasenger side of the engine compartment. This relay gets stuck and does not open when the ignition key is turned off or after the engine is started.
Take the bulbs out...
the ignition actuator is broken, you can turn off the "battery power" by the the ignition actuator rod that leads to the ignition switch, it runs along the top of the steering column under the dash, locate it and pull it towards the steering wheel, this should shut off the power. or you can unhook you battery, but either way you will have to replace the actuator.