Simple Answer: The Ignition lock. There is a metal tab located on the tumbler assembly, which when turning the key [to start the car] presses on a switch [which turns on a relay; which kicks in the starter] This tab most likely broke off. Replace the tumbler assembly
The lock is accessible by removing the steering wheel and the signal switch underneath. You have to depress the spring loaded catch that is visible from above with the tip of a flat blade screwdriver and it will pop out.
This problem is caused by disc brakes that have a fluid leaking from the calipers. You can buy loaded calipers an install to the car to fix the problem.
you must first insert the key into the ignition. Then turn the ignition clockwise to the accessory position. Underneatch the key slot on the ignition there should be a small pin hole. Use a small pin or paper clip to depress the spring loaded pin in the small hole. Once the pin has been depressed turn the ingition counter clockwise as far as it will go. The ignition should disengage and slide out.
First, the best thing to do is go over to the parts store and pick up an ignition lock cylinder WITH KEYS. Then take off all parts of the dash that cover up your cylinder. Then look at the new one find where the little button is to push. Put the keys in the ignition, turn it to the on position (battery disconnected), push the pin in and it will come right out by pulling on the key
I just today, 11/25/2005, changed an ignition switch on a 1981 Ford F150 that has only 63,000 miles. It took less than 2 minutes. Under the ignition switch there is a small 1/8" hole that has a pin in it. It is spring loaded. Turn the ignition almost to the start position and depress the pin into the column. Pull the ignition switch straight out. Look down into the cavity where the switch came out and notice the 3/32" channel that is in the 2:00 position on the cavity. Make sure to line up the new switch so that the square male channel slids into the female walls inside the column. Just slide the new switch in fully and it will snap into place when the spring loaded pin hits the sweet spot. No problems with the starting of the engine and you are ready to go.
Turning the steering wheel left to right rapidly while turning the key in the ignition should free up the ignition switch. If this does not rectify the problem it could be with the lever lockout or the key itself.
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Put the key in, turn to position 2, press small Alan key or something simlar into little hole on top of the barrel, should feel a spring loaded switch. press down and barrel will pull out.
Remove the plastic 2 piece shroud around steering column so as to gain access to the housing the tumbler sits in. Find three Phillips screws to remove in holes in the lower piece. Turn the ignition key to the Run position. Insert a small tip screwdriver in the access hole on the bottom of the housing to push the spring-loaded tab which will free the tumbler so you can simply pull the tumbler out with the key. Installation is the reverse. Be sure tumbler with key inserted is set to the Run position. Depress spring-loaded tab, insert tumbler into housing hole with tab down. All the way in, turn key to the Lock (off position).
Remove the plastic 2 piece shroud around steering column so as to gain access to the housing the tumbler sits in. Find three Phillips screws to remove in holes in the lower piece. Turn the ignition key to the Run position. Insert a small tip screwdriver in the access hole on the bottom of the housing to push the spring-loaded tab which will free the tumbler so you can simply pull the tumbler out with the key. Installation is the reverse. Be sure tumbler with key inserted is set to the Run position. Depress spring-loaded tab, insert tumbler into housing hole with tab down. All the way in, turn key to the Lock (off position).
When a cantilever beam is continuously loaded and released from mean position, in one direction only, it is called unidirectional bending, but when it is loaded alternately, first in one direction and then in the opposite direction from mean position, then it is called reversed bending.
Remove the plastic 2 piece shroud around steering column so as to gain access to the housing the tumbler sits in. Find three Phillips screws to remove in holes in the lower piece. Turn the ignition key to the Run position. Insert a small tip screwdriver in the access hole on the bottom of the housing to push the spring-loaded tab which will free the tumbler so you can simply pull the tumbler out with the key. Installation is the reverse. Be sure tumbler with key inserted is set to the Run position. Depress spring-loaded tab, insert tumbler into housing hole with tab down. All the way in, turn key to the Lock (off position).