KTM 625 SXC 2003 Owner's Manual page 49

TROUBLE
Headlight and parking light
fail
Flasher lights, brake light
and horn fail
The battery is discharged
48
CAUSE
Blown fuse
Blown fuse
The ignition (power consumer)
hasn't been switched off
The battery isn't charged by the
generator because
REMEDY
Replace fuse (5)
Replace fuse (4)
Recharge the battery according to the relevant instructions.
Remove seat and check voltage regulator connections; voltage
regulator and generator should be checked by a KTM dealer.