Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4380-2 | Ground |
Ignition ON. Using a diagnostic scan tool, monitor the BCM Parameter Identifications (PIDs). Using a diagnostic scan tool, command the BCM anti-theft alarm horn PID on and then off.
Does the test lamp illuminate when the PID is commanded on?
Yes | GO to D2 |
|---|---|
No | VERIFY the BCM fuse 8 (10A) is OK. If OK, GO to D3 If not OK, REFER to the Wiring Diagrams manual to identify the possible cause of the circuit short. |
D2 CHECK THE ANTI-THEFT SECURITY HORN GROUND CIRCUIT FOR AN OPEN USING THE BCM (BODY CONTROL MODULE) PID (PARAMETER IDENTIFICATION)
NOTICE: The following step uses a test lamp to simulate normal circuit loads. Use only a Rotunda Test Lamp (SGT27000) or 250- 300mA incandescent bulb test lamp. To avoid connector terminal damage, use the Rotunda Flex Probe kit for the test lamp probe connection to the vehicle. Do not use the test lamp probe directly on any connector.
Connect:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4380-2 | Ground |
Using a diagnostic scan tool, monitor the BCM Parameter Identifications (PIDs). Using a diagnostic scan tool, command the BCM anti-theft alarm horn PID on and then off.
Does the test lamp illuminate when the PID is commanded on?
Yes | INSTALL a new anti-theft alarm horn. REFER to: Anti-Theft Alarm Horn (419-01A Perimeter Anti-Theft Alarm, Removal and Installation). |
|---|---|
No | REPAIR the circuit. |
D3 CHECK THE ANTI-THEFT SECURITY HORN VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
Ignition OFF. Disconnect BCM C2280C. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4380-2 | C2280C-34 |
Is the resistance less than 3 ohms?
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.