Ford 2003 Mustang Workshop Manual page 3460

Disconnect: Multifunction Switch C202b.
Measure the resistance between multifunction switch C202b Pin
44, Circuit 44 (LB), harness side and the electronic flasher C2141
Pin 1, Circuit 44 (LB), harness side; and between multifunction
switch C202b Pin 44, Circuit 44 (LB), 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?
J3 CHECK THE CONTINUITY OF THE MULTIFUNCTION SWITCH
Carry out the multifunction switch component test.
Refer to Wiring Diagrams Cell
information.
Is the switch OK?
PINPOINT TEST K: THE HAZARD FLASHER LAMPS ARE NEVER ON
K1 CHECK THE VOLTAGE TO THE ELECTRONIC FLASHER
Disconnect: Electronic Flasher C2141.
Measure the voltage between electronic flasher C2141 Pin 3,
Circuit 383 (RD/WH), harness side and ground.
Is the voltage greater than 10 volts?
K2 CHECK CIRCUIT 385 (WH/RD)
Disconnect: Multifunction Switch C202b.
149 for schematic and connector
Test Step
GO to J3 .
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.
Result / Action to
Take
Yes
GO to K2 .
No
REPAIR the circuit.
TEST the system for
normal operation.
Yes