Ford Mustang no start issue with theft light flashing due to damaged wiring and possible anti-theft system malfunction on Ford Mustang

Some Ford Mustang owners report experiencing no-start issues accompanied by a flashing theft light, which is often indicative of damaged wiring or a malfunction in the anti-theft system. Many owners note that the blinking theft light serves as a symptom rather than the root cause of the problem. In certain instances, the vehicle may turn over but fail to start, with the theft light flashing rapidly. Attempts to reset keys or turn the steering wheel may prove ineffective if the theft light continues to blink. The anti-theft light typically deactivates after about three seconds, but persistent or rapid flashing may suggest a problem with the Passive Anti-Theft System (PATS). To troubleshoot, some owners have found success in resetting the system by disconnecting the battery for an hour, while others recommend inserting the key into the lock and holding it to allow the anti-theft system to detect the RF signal from the key fob.