Ford 2003 Mustang Workshop Manual page 695

L2 CHECK CIRCUIT 959 (GY) FOR AN OPEN
Key in OFF position.
Disconnect: Traction Control Switch C239.
Measure the resistance between instrument cluster C251 Pin 9,
Circuit 959 (GY), harness side and traction control switch C239
Pin 4, Circuit 959 (GY), harness side.
Is the resistance less than 5 ohms?
L3 CHECK CIRCUIT 489 (PK/BK) FOR AN OPEN
Key in ON position.
Measure the voltage between traction control switch C239 Pin
3, Circuit 489 (PK/BK), harness side and ground.
Is the voltage greater than 10 volts?
PINPOINT TEST M: THE TRACTION CONTROL INDICATOR IS
INOPERATIVE—TRACTION CONTROL SWITCH
M1 CHECK CIRCUIT 960 (BK/LB)
Key in OFF position.
Disconnect: Instrument Cluster C251.
Disconnect: Traction Control Switch C239.
Measure the resistance between instrument cluster C251 Pin 8,
Circuit 960 (BK/LB), harness side and traction control switch C239
Pin 5, Circuit 960 (BK/LB), harness side; and between instrument
cluster C251 Pin 8, Circuit 960 (BK/LB), harness side and ground.
Test Step
Yes
GO to L3 .
No
REPAIR the circuit.
TEST the system for
normal operation.
Yes
INSTALL a new traction
control switch. TEST the
system for normal
operation.
No
REPAIR the circuit.
TEST the system for
normal operation.
Result / Action to
Take
Yes
GO to M2 .
No