Ford 2003 Mustang Workshop Manual page 782

6. Open the glove compartment, push in on the tabs and open the glove compartment door to its
fullest extent.
7. Remove the right hand A/C register duct.
Remove the two screws retaining the duct to the A/C register.
Separate the A/C duct at the air plenum and remove the duct.
8. Disconnect the passenger air bag module.
9. Attach the restraint system diagnostic tool to the vehicle harness side of the passenger air bag
electrical connector.