One problem related to electrical system has been reported for the 1999 Ford Mustang. The most recently reported issues are listed below.
Car had been parked in garage for about 8 hours since driven. Car caught fire and destroyed garage and car. Fire investigator said the fire was caused by brake switch in master cylinder.
| Ignition problems | |
| Wiring problems | |
| Electrical System problems | |
| Dash Wiring problems | |
| Anti-theft Controller problems | |
| Ignition Switch problems | |
| Battery problems |