'70 Ignition Switch Replacement
The '70 Mustang was similar to the '69. However, government-mandated safety and antitheft changes meant the '70 would be considerably different inside, with a one-year-only, locking steering column. The ignition lock cylinder locks the steering column when the ignition is in the "off" position. When the steering column is unlocked to start the engine, you're moving a linkage inside the steering column that operates the ignition switch, located halfway down the column. Replacement is easy. All you have to do is remove the plastic steering-column cover.
Disconnect the switch and...
Disconnect the switch and remove the linkage pin, located where the linkage and switch join.
Remove two nuts and remove...
Remove two nuts and remove the switch.
Install the new switch and...
Install the new switch and secure the nuts. Reinstall the linkage pin.
Turn the ignition switch to...
Turn the ignition switch to "ACC" and pull the switch as far down the column as it will go. Secure the nuts and connect the new switch.
'71-'73 Ignition Switch Replacement
Ford changed the Mustang's locking steering column again in '71-'73 models, moving the ignition switch farther down the column. A long linkage ties the ignition lock cylinder with the ignition switch way down the column. Replacement is a piece of cake.
Remove the ignition switch...
Remove the ignition switch retaining nuts.
Disconnect the linkage from...
Disconnect the linkage from the switch, then disconnect the switch.
Install the new switch and...
Install the new switch and adjust it the same way you would a '70 switch. Turn the ignition key to "ACC" and pull the switch as far down the column as it will move. Secure the nuts and connect the switch.
'70-'73 Lock Cylinder Removal
Lock cylinder removal for '70-'73 Mustangs is different than for '65-'69 models. The steering wheel must be removed. Once removed, press on a release pin inside the column at the lock cylinder. Turn the lock cylinder toward "ACC" and pull it out. To reinstall, turn the lock cylinder all the way to "START" and insert the cylinder.