A5 CHECK THE AM (AMPLITUDE MODULATION) SIGNAL AMPLIFIER CIRCUIT FOR CORRECT — 2016 workshop reference 4334

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

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

Is the voltage greater than 11 volts?

Yes	GO to A8
No	GO to A6

A6 CHECK THE AM (AMPLITUDE MODULATION) SIGNAL AMPLIFIER CIRCUIT FOR A SHORT TO GROUND

Ignition OFF. Disconnect: ACM C240A. Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C4082-1		Ground

Is the resistance greater than 10,000 ohms?

Yes	GO to A7
No	REPAIR the circuit.

A7 CHECK THE AM (AMPLITUDE MODULATION) SIGNAL AMPLIFIER CIRCUIT FOR AN OPEN

Ignition OFF. Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C4082-1		C240A-2

Source reference 4334

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.