Symptom:
ALL INPUTS NO ACTIVITY
When Monitored and Set Condition:
ALL INPUTS NO ACTIVITY
When Monitored: When the DRBIIIt performs the amplifier Input Test.
Set Condition: The Amplifier detects no activity on any of the input circuits.
POSSIBLE CAUSES
(+) CIRCUIT SHORTED TO GROUND
(-) CIRCUIT SHORTED TO GROUND
OPEN SPEAKER CIRCUITS
AMPLIFIER
RADIO
TEST ACTION APPLICABILITY
1 NOTE: The fault condition must be present to continue diagnosis. Use the
DRBIIIt to perform the Amplifier pretest to verify the fault condition is
present before continuing diagnosis.
Turn the ignition off.
Disconnect the Amplifier C1 harness connector.
Disconnect the Radio harness connector.
Measure the resistance between ground and any speaker (+) circuit.
Is the resistance below 1000.0 (1K) ohms?
All
Yes → Repair the speaker (+) circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 2
2 Turn the ignition off.
Disconnect the Amplifier C1 harness connector.
Disconnect the Radio harness connector.
Measure the resistance between ground and any speaker (-) circuit.
Is the resistance below 1000.0 (1K) ohms?
All
Yes → Repair the speaker (-) circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 3
183
AUDIO
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