The ignition switch could experience an internal short circuit.
Electrical system
Ford Thunderbird Electrical problems by year
0 complaints filed with NHTSA about the Ford Thunderbird's electrical system. Dead batteries, warning lights, wiring, alternators, infotainment and electronic module failures.
Electrical complaints by model year
Electrical recalls
Battery to starter cables are longer than specified; excessive cable length could contact engine damper pulley.
Latest Thunderbird electrical complaints
No complaints in this area yet.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data