Ford 2003 Mustang Workshop Manual page 3015

Is the voltage greater than 10 volts?
A4 CHECK CIRCUIT 10 (LG/RD) FOR AN OPEN
Disconnect: Deactivator Switch C2210.
Measure the voltage between deactivator switch C2210 Pin 1,
Circuit 10 (LG/RD), harness side and ground.
Is the voltage greater than 10 volts?
A5 CHECK CIRCUIT 636 (OG) FOR AN OPEN
Measure the resistance between speed control servo C122 Pin
9, Circuit 636 (OG), harness side and deactivator switch C2210
Pin 2, Circuit 636 (OG), harness side.
Is the resistance less than 5 ohms?
A6 CHECK THE SPEED CONTROL ACTUATOR SWITCH ON
CIRCUITRY
Measure the voltage between speed control servo C122 Pin 5,
Circuit 151 (LB/BK), harness side and speed control servo C122
Pin 10, Circuit 1205 (BK), harness side, while the speed control
actuator switch ON is depressed.
Yes
GO to A5 .
No
REPAIR the circuit.
TEST the system for
normal operation.
Yes
INSTALL a new
deactivator switch;
REFER to Switch—
Deactivator . TEST the
system for normal
operation.
No
REPAIR the circuit.
TEST the system for
normal operation.
Yes
GO to A9 .
No
GO to A7 .