yo fatcole77,
It may be just the lock sylinder;
try this;
Lock Cylinder & Switch Replacement & Depictions in 87-91 (figure 1) (from Factory Manual and the Ford Electrical & Vacuum Troubleshooting Manual (EVTM)
Source: by Broncobill78 (Dave) at Ford Bronco Zone Forums
http://broncozone.com/topic/14120-87-91-ignition-switch-info-troubleshooting-guide/
It is out of order, so read the 2nd from left page first; it's about it not starting
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If cylinder isn't the culprit;
"...OEM part #E9TZ 3E715 B available at either a Ford Stealership or in the Help section, mfg Dorman...this part is for BOTH Tilt and Non-Tilt steering columns. When you turn the key to "RUN/START" and there's no spring resistance feeling it usually the actuator is broken, you can jump start the "stater relay" with the key turned to "RUN" which to me is very harsh on the relay as they are cheaply made
word of caution when driving that a piece of the broken actuator can move forward and jam the steering wheel and column shifter.....making it difficult turning and shifting...
PATIENCE is the word you need to remember when doing this job, put down a big piece of cardboard if necessary and make a diagram of the column, lable it so you can keep track of where all the parts go...
Also be CAREFULL if you drop the steering column from it's dash support, there is a white cable wrapping around it from underneath winding up on the left side which is the dash PRNDL adustment, it's spring loaded with a wire a fine wire loop to a small adjustment ***** DON'T BREAK IT with the weight of the column, use something to prop the column from going too far dowward, you'll see it when you take off the "column shroud" you'll also need to free up the column harness so you can stretch it up a bit to move the directional signal cam out of the way.....study the thread I mentioned and you'll be fine...
When you get this done, check and make sure the column shift linkage is in sync with the transmission..."
by JKossarides ("The Bronco", Jean)