PINPOINT TEST S : THE SUBWOOFER SPEAKER IS INOPERATIVE (WITH SHAKER)
S1 CHECK THE SUBWOOFER AMPLIFIER VOLTAGE SUPPLY
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4109A-5 | Ground |
Is the voltage greater than 11 volts?
Yes | GO to S2 |
|---|---|
No | VERIFY the BCM fuse 5 (20A) is OK. If OK, REPAIR the circuit. |
S2 CHECK THE SUBWOOFER AMPLIFIER GROUND CIRCUIT
Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4109A-5 | C4109A-2 |
Is the voltage greater than 11 volts?
Yes | GO to S3 |
|---|---|
No | REPAIR the circuit. |
S3 CHECK THE SUBWOOFER AMPLIFIER ENABLE CIRCUIT FOR CORRECT VOLTAGE
NOTICE: This pinpoint test step directs testing circuits using a back-probe method. Use the special back-probe tool POM6411. Do not force test leads or other probes into connectors. Adequate care must be exercised to avoid connector terminal damage, while ensuring that good electrical contact is made with the circuit or terminal. Failure to follow these instructions may cause damage to wiring, terminals, or connectors, and may cause subsequent electrical faults.
Ignition OFF. Connect: Subwoofer Amplifier C4109A. Ignition ON. Operate the audio system in AM/ FM mode. Measure the voltage by back-probing subwoofer amplifier C4109A:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4109A-1 | Ground |
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.