Ford 2003 Mustang Workshop Manual page 3379

17. Remove the nuts and disconnect the starter solenoid electrical connections.
18. Pull the harness forward until it clears the motor mount, then remove the entire battery cable
harness from the vehicle.
Installation
1. NOTE: When the battery is disconnected and reconnected, some abnormal drive symptoms
may occur while the vehicle relearns its adaptive strategy. The vehicle needs to be driven to
relearn the strategy.
To install, reverse the removal procedure.