Ford 2003 Mustang Workshop Manual page 3461

Measure the resistance between multifunction switch C202b Pin
385, Circuit 385 (WH/RD), harness side and electronic flasher
C2141 Pin 4, Circuit 385 (WH/RD), harness side; and between
multifunction switch C202b Pin 385, Circuit 385 (WH/RD), harness
side and ground.
Is the resistance less than 5 ohms between the multifunction
switch and the electronic flasher, and greater than 10,000
ohms between the multifunction switch and ground?
K3 CHECK THE CONTINUITY OF THE MULTIFUNCTION SWITCH
Carry out the multifunction switch component test.
Refer to Wiring Diagrams Cell
information.
Is the switch OK?
149 for schematic and connector
GO to K3 .
No
REPAIR the circuit.
TEST the system for
normal operation.
Yes
INSTALL a new
electronic flasher.
TEST the system for
normal operation.
No
INSTALL a new
multifunction switch;
REFER to Section
211-05 . TEST the
system for normal
operation.