How To Replace Door Locks And Cylinders

Mustang trunk locks became simpler and had fewer parts as time passed. This is a '65-'66 with a die-cast lock cylinder sleeve (escutcheon) and lock cylinder similar to that of the ignition switch. A release pin is accessible once the lock assembly is removed from the decklid. Press the release pin and out it comes.

For '67, Ford changed the Mustang's trunk lock in two ways. It moved the lock out of the decklid to the body and retained it with a spring steel clip as found in the doors. Ford also went to a double-sided key in '67 for improved security and convenience. This is what you can expect to see from '67-'70s.

For '71-'73, Ford moved the trunk lock cylinder back into the decklid and retained it with a two-bolt bracket in the lid. Remove the bracket and the lock cylinder comes right out.

The '65-'66 Mustang trunk lock replacement is the most challenging of all model years. The latch mechanism is retained with two body bolts. You're going to need a 1/2-inch socket.

You'll need a 1-inch deep-well socket to remove the trunk lock cylinder. Remove this nut and the entire lock comes out.

Remove this sleeve next, which goes between the 1-inch nut and the lock.

Turn the lock clockwise to the release point and depress this pin, which releases the lock cylinder.

o install the new cylinder, depress the pin with the key installed and insert the cylinder as shown. Press all the way in and return clockwise until the pin pops. This pin retains the lock cylinder.