Ford 2003 Mustang Workshop Manual page 3449

Is the voltage greater than 10 volts?
C3 CHECK CIRCUIT 632 (GY/OG) FOR OPEN
Disconnect: Multifunction Switch C202a.
Measure the resistance between the CJB Fuse 38 (20A),
and multifunction switch C202a Pin 12, Circuit 632
(GY/OG), harness side.
Is the resistance less than 5 ohms?
PINPOINT TEST D: ONE LOW BEAM HEADLAMP IS INOPERATIVE
D1 CHECK THE VOLTAGE TO THE INOPERATIVE HEADLAMP
BULB
Disconnect: Inoperative Headlamp.
Place the headlamp switch in the ON position.
Place the multifunction switch in the low beam position.
Measure the voltage between RH headlamp C1041 Pin 3,
Circuit 1056 (DB/LG), or LH headlamp C1021 Pin 3, Circuit
1055 (WH/LG), harness side and ground.
Is the voltage greater than 10 volts?
Test Step
GO to C3 .
Yes
INSTALL a new
multifunction switch; REFER
to Section 211-05 . TEST
the system for normal
operation.
No
REPAIR the circuit. TEST
the system for normal
operation.
Result / Action to Take
Yes
INSTALL a new
headlamp bulb; REFER
to Bulb—Headlamp
this section. TEST the
system for normal
operation.
No
REPAIR the circuit. TEST
the system for normal
operation.
in