Ford 2012 Mustang Owner's Manual page 233

The fuses are coded as follows:
Fuse/Relay Fuse Amp
Location
1
2
3
4
5
6
7
8
9
10
2012 05+ Mustang (197)
Owners Guide, 1st Printing
USA (fus)
Roadside Emergencies
Protected Circuits
Rating
30A Driver rear window (convertible
only)
15A Not used (spare)
15A SYNC
30A Passenger rear window
(convertible only)
10A Brake transmission shift interlock
(BTSI)
20A Turn signals, Hazard flashers
10A Left low beam headlamp
10A Right low beam headlamp
15A Courtesy lamps
15A Switch illumination
233