Section 13-11: Anti-Theft Alarm System
1994 Mustang Workshop Manual
DIAGNOSIS AND TESTING
Symptom Chart
Condition
Possible Source
Action
Alarm System Does Not Arm or Disarm Properly
Procedure error.
Open circuit.
Go to
Pinpoint Test A
.
Alarm System Does Not Activate Properly
Electronic door lock control processor.
Open circuit.
Go to
Pinpoint Test B
.
Alarm System Does Not Disarm After Activation
Electronic door lock control processor.
Open circuit.
Go to
Pinpoint Test C
.
Engine Will Not Crank
Electronic door lock control processor.
Open circuit.
Starting system circuit.
Go to
Pinpoint Test D
.
Alarm Indicator On At All Times
Electronic door lock control processor.
Open circuit.
Go to
Pinpoint Test E
.
Alarm Indicator Does Not Turn On To Indicate Arming
Electronic door lock control processor.
Open circuit.
Go to
Pinpoint Test F
.
Horn, Headlamps and/or Exterior Lamps Always On
Electronic door lock control processor.
Circuits.
Horn/lamp circuits.
Go to
Pinpoint Test G
.
System Activates Falsely
Electronic door lock control processor.
Circuits.
Switches/sensors.
Go to
Pinpoint Test H
.
Alarm Goes Off When Luggage Compartment Door Is Open
Door lock cylinder switch.
Go to
Pinpoint Test J
.