We're not completely certain where the first key-operated ignition switches appeared. However, we are certain they've made the world safer for our automobiles. Think of the ignition switch as your Mustang's sentry. It acknowledges only the key you were given with the car, bringing your Mustang's engine and all of its accessories to life with a twist. The ignition switch, its lock cylinder, and your key keep things personal.
Things become impersonal whenever the ignition switch or lock cylinder fail to do their jobs. Few things make us feel more defeated than a car that won't start. The truth is, ignition switches rarely fail. They typically work faithfully year after year. However, many classic Mustangs still have their factory ignition switches and lock cylinders, installed when Lyndon Johnson was president. It may be time for a change.
The '65-'66 Mustang ignition...
The '65-'66 Mustang ignition switch (shown) is tied to the electrical system with a multiplex plug. The center post is for accessories. This switch is retained by a spring-loaded push-and-turn escutcheon.
For 1967, the Mustang's ignition...
For 1967, the Mustang's ignition switch changed for one year only. Think of the '67 ignition switch as a little bit of old and a little bit of new. It looks different with a fat barrel and a screw-on escutcheon, but it retains the '65-'66-style center accessory power post and multiplex plug.
This is the plug-in, '68-'69...
This is the plug-in, '68-'69 ignition switch. Gone is the center accessory post. Because this switch's load factor was apparently too high, it tended to cook the wiring, so Ford included a new plug with the replacement switch.
When Ford went to locking...
When Ford went to locking steering columns in 1970, it completely changed the ignition switch's appearance. For 1970 only, the ignition switch was located below the top collar and actuated by a rod tied to the ignition lock cylinder, located at 4 o'clock on the column. It's easy to replace. One problem-it's not available new.
This is the '71-'73 Mustang...
This is the '71-'73 Mustang ignition switch. Because Ford changed the steering column's design for 1971, the switch was located further down the column near the bottom. Access is even easier.
'65-'66 Ignition Switch Replacement
The ignition lock cylinder is removed first. Turn the ignition left to "ACC" and insert a paper clip into the hole beneath the key hole. Turn the key counterclockwise to 9 o'clock.
The paper clip presses a release....
The paper clip presses a release. When the lock cylinder is turned to 9 o'clock, the cylinder slides right out.
The ignition switch's escutcheon...
The ignition switch's escutcheon is a press-and-turn setup. Once you've disconnected the plug from behind, hold the switch and escutcheon, then push the switch toward you and turn it clockwise. It should release from the escutcheon and pop out.
The spring load and lock pins...
The spring load and lock pins keep everything together. The ignition lock cylinder secures the package.
Install the cup on the new...
Install the cup on the new ignition switch as shown.
Position the new switch, cup,...
Position the new switch, cup, and spring in place. Insert the escutcheon. Push the two together and turn the switch counterclockwise.
Install the ignition lock...
Install the ignition lock cylinder by inserting it at 9 o'clock,....
....then turning clockwise....
....then turning clockwise. It will click and lock into place. Check for proper operation.
Install the plug as shown...
Install the plug as shown here. We're showing you this installation outside the vehicle. The plug is retained with a self-locking nut on the center post. The center post is for accessory leads. These leads must always be protected by a fuse.