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. |
B4 CHECK THE AM (AMPLITUDE MODULATION) SIGNAL AMPLIFIER CIRCUIT FOR CORRECT VOLTAGE
Ignition OFF. Disconnect: Antenna C4823. Ignition ON. Operate the audio system in AM mode. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4823-1 | Ground |
Is the voltage greater than 11 volts?
Yes | GO to B7 |
|---|---|
No | GO to B5 |
B5 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 |
|---|---|---|
C4823-1 | Ground |
Is the resistance greater than 10,000 ohms?
Yes | GO to B6 |
|---|---|
No | REPAIR the circuit. |
B6 CHECK THE AM (AMPLITUDE MODULATION) SIGNAL AMPLIFIER CIRCUIT FOR AN OPEN
Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4823-1 | C240A-2 |
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.