A3 CHECK THE IGNITION CIRCUITS

• For vehicles with the 5.0L 32V Ti-VCT, REFER to: Generator - 5.0L 32V Ti-VCT (414-02 Generator and Regulator, Removal and Installation).

• For vehicles with the 5.2L, REFER to: Generator - 5.2L 32V Ti-VCT (414-02 Generator and Regulator, Removal and Installation).

No	GO to A3

Ignition OFF. Connect: Generator B+ Cable C102C. Visually inspect the engine compartment and make sure all ignition coils are correctly and securely connected, and that there are no visible cracks in the coil housings. Inspect all the wiring harnesses and connectors for damaged insulation and loose or broken conditions.

Are the ignition components OK?

Yes	USE a jumper cable to temporarily ground various parts of the vehicle (examples include: engine, fenders, quarter panels, body sheet metal) to the frame. When the noise is eliminated, PROVIDE a permanent ground where necessary.
No	REPAIR the ignition system as necessary.

A4 CHECK THE AUDIO SYSTEM RECEPTION WITH THE REAR WINDOW DEFROST GRID ACTIVATED

Operate the audio system in AM/ FM mode. Check the reception with the rear window defrost grid activated and deactivated.

Is poor reception only present with the rear window defrost grid activated?

Yes	The grid line material is not embedded in the glass, but is baked onto the glass surface, and consequently can be scraped off. Carefully INSPECT and REPAIR the AM/ FM on-glass antenna grid. REFER to: Heated Window Grid Wire Repair (501-11 Glass, Frames and Mechanisms, General Procedures).
No	• For a concern with only the AM radio, GO to A5 • For a concern with only the FM radio, or with both the AM and FM radio, GO to A8

Yes

The grid line material is not embedded in the glass, but is baked onto the glass surface, and consequently can be scraped off. Carefully INSPECT and REPAIR the AM/ FM on-glass antenna grid. REFER to: Heated Window Grid Wire Repair (501-11 Glass, Frames and Mechanisms, General Procedures).

• For a concern with only the AM radio, GO to A5

• For a concern with only the FM radio, or with both the AM and FM radio, GO to A8

A5 CHECK THE AM (AMPLITUDE MODULATION) SIGNAL AMPLIFIER CIRCUIT FOR CORRECT VOLTAGE

Ignition OFF. Disconnect: AM/ FM Antenna Amplifier C4082. Ignition ON. Operate the audio system in AM mode. Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C4082-1		Ground

Source reference 4122

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.