The 1966 Ford Mustang featured a dashboard-mounted ignition switch. When the switch is turned to the "ON" position, a signal is sent to the starter solenoid. The solenoid acts as a gateway between the battery and the starter. The solenoid opens and allows the power from the battery to turn the starter motor. Therefore, a defective ignition switch may prevent the engine from starting and should be replaced. Replacing the ignition switch generally takes about 15 minutes and requires no major disassembly.
Insert the ignition key into the ignition switch.
Turn the ignition key to the accessory position.
Straighten a metal paperclip.
Insert the tip of the paperclip into the lock cylinder release hole on the face of the lock cylinder, next to the ignition key.
Press the paperclip into the lock cylinder. Turn the ignition key in a counterclockwise direction past the accessory position.
Pull the lock cylinder out of the ignition switch using the ignition key.
Remove the chrome bezel that surrounds the ignition switch with Ford Tool Number T65L-700-A. The tool fits into the grooves on the face of the bezel. Turn the bezel in a counterclockwise direction with the tool to remove the bezel.
Reach underneath the dashboard and pull the ignition switch away from the dashboard.
Pull the electrical plug off the back of the switch to release it.
Press the electrical plug onto the back of the new ignition switch.
Position the switch against the back of the dashboard.
Tighten the bezel onto the front of the switch by turning the bezel in a clockwise direction with the bezel tool.
Insert the lock cylinder into the ignition switch with the ignition key.
Turn the ignition key in a clockwise direction until the lock cylinder clicks into place.
