Perimeter Anti-Theft Alarm — 2016 workshop reference 5995

Disconnect and inspect all the BCM connectors. Repair:

corrosion (install new connector or terminals – clean module pins) damaged or bent pins – install new terminals/pins pushed-out pins – install new pins as necessary

Reconnect the BCM connectors. Make sure they seat and latch correctly. Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Click here to access Guided Routine (BCM).
No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

Yes

CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical

Service Bulletins (TSBs) address this concern, Click here to access Guided Routine (BCM).

The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

No Anti-Theft Alarm Horn Output During Alarm Activation

Refer to Wiring Diagrams Cell 117 for schematic and connector information.

Normal Operations and Fault Conditions

REFER to: Perimeter Anti-Theft Alarm - System Operation and Component Description (419-01A Perimeter Anti-Theft Alarm, Description and Operation).

Possible Causes

Fuse Wiring, terminals or connectors Anti-theft alarm horn BCM

Visual Inspection and Diagnostic Pre-checks

Inspect the BCM fuse 8 (10A)

PINPOINT TEST D : NO ANTI-THEFT ALARM HORN OUTPUT DURING ALARM ACTIVATION

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

D1 CHECK FOR VOLTAGE TO THE ANTI-THEFT SECURITY HORN 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.

Ignition OFF. Disconnect Anti-Theft Security Horn C4380. Connect:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead

Source reference 5995

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.