Ford 2003 Mustang Workshop Manual page 3014

Pinpoint Tests
PINPOINT TEST A: THE SPEED CONTROL IS INOPERATIVE
A1 CHECK THE SPEED CONTROL SERVO VOLTAGE AND
GROUND
Key in OFF position.
Disconnect: Speed Control Servo C122.
Key in ON position.
Measure the voltage between speed control servo C122 Pin 7,
Circuit 294 (WH/LB), harness side and speed control servo
C122 Pin 10, Circuit 1205 (BK), harness side.
Is voltage greater than 10 volts?
A2 CHECK THE CIRCUIT 1205 (BK) FOR AN OPEN
Key in OFF position.
Measure the resistance between speed control servo C122 Pin
10, Circuit 1205 (BK), harness side and ground.
Is the resistance less than 5 ohms?
A3 CHECK DEACTIVATOR SWITCH CIRCUITRY
Measure the voltage between speed control servo C122 Pin 9,
Circuit 636 (OG), harness side and speed control servo C122
Pin 10, Circuit 1205 (BK), harness side.
Test Step Result / Action to Take
Yes
GO to A3 .
No
GO to A2 .
Yes
REPAIR Circuit 294
(WH/LB). TEST the
system for normal
operation.
No
REPAIR Circuit 1205
(BK). TEST the system
for normal operation.
Yes
GO to A6 .
No
GO to A4 .