Dodge Ram. Manual — part 54
Symptom:
LEFT FRONT I/P CHANNEL SHORT ACROSS
When Monitored and Set Condition:
LEFT FRONT I/P CHANNEL SHORT ACROSS
When Monitored:
When the DRBIII
t performs the Speaker Output test.
Set Condition:
When the Left Front I/P Speaker circuit is shorted.
POSSIBLE CAUSES
LEFT FRONT I/P CHANNEL SHORT ACROSS
LEFT FRONT I/P SPEAKER CIRCUITS SHORTED
AMPLIFIER
TEST
ACTION
APPLICABILITY
1
NOTE: The fault condition must be present to continue diagnosis. Use the
DRBIII
t to perform the Amplifier pretest to verify the fault condition is
present before continuing diagnosis.
Turn the ignition off.
Access and disconnect the Left Front I/P Speaker harness connector.
Turn the ignition on.
With the DRBIII
t, perform the Amplifier pretest.
Is the fault condition still present?
All
Yes
→ Go To 2
No
→ Replace the Left Front I/P Speaker in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Access and disconnect the Left Front I/P Speaker harness connector.
Access and disconnect the Amplifier C2 harness connector.
Measure the resistance of the Left Front I/P Speaker (+) and (-) circuits.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Left Front I/P Speaker (+) and (-) circuits for a short
together.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Amplifier in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
213
AUDIO
Symptom:
LEFT FRONT INPUT NO ACTIVITY
When Monitored and Set Condition:
LEFT FRONT INPUT NO ACTIVITY
When Monitored:
When the DRBIII
t performs the amplifier Input Test.
Set Condition:
The Amplifier detects no activity on the input circuit.
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
DRBIII
t 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 the left front 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 the left front 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
214
AUDIO
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Amplifier C1 harness connector.
Disconnect the Radio harness connector.
Measure the resistance of each left front speaker (+) and (-) circuit between the Radio
and the Amplifier.
Is the resistance below 5.0 ohms for each circuit?
All
Yes
→ Go To 4
No
→ Repair the speaker circuits for an open.
Perform BODY VERIFICATION TEST - VER 1.
4
Turn the ignition off.
Reconnect the Radio harness connector.
Disconnect the Amplifier C1 harness connector.
Turn the ignition on and the Radio on to a known good radio station or have a tape
or CD playing.
Turn the radio volume control up at least 25 positions.
With the voltmeter in the AC voltage scale, measure the voltage of each left front
speaker circuit at the Amplifier C1 connector.
NOTE: Perform this test on each left front speaker circuit.
Is the voltage at least 120mV AC (0.12 VAC) on each speaker circuit?
All
Yes
→ Replace the Amplifier in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Radio.
Perform BODY VERIFICATION TEST - VER 1.
215
AUDIO
LEFT FRONT INPUT NO ACTIVITY —
Continued
Symptom:
LEFT REAR CHANNEL SHORT ACROSS
When Monitored and Set Condition:
LEFT REAR CHANNEL SHORT ACROSS
When Monitored:
When the DRBIII
t performs the Speaker Output test.
Set Condition:
When the Left Rear Speaker circuit is shorted.
POSSIBLE CAUSES
LEFT REAR CHANNEL SHORT ACROSS
LEFT REAR SPEAKER CIRCUITS SHORTED
AMPLIFIER
TEST
ACTION
APPLICABILITY
1
NOTE: The fault condition must be present to continue diagnosis. Use the
DRBIII
t to perform the Amplifier pretest to verify the fault condition is
present before continuing diagnosis.
Turn the ignition off.
Access and disconnect the Left Rear Speaker harness connector.
Turn the ignition on.
With the DRBIII
t, perform the Amplifier pretest.
Is the fault condition still present?
All
Yes
→ Go To 2
No
→ Replace the Left Rear Speaker in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Access and disconnect the Left Rear Speaker harness connector.
Access and disconnect the Amplifier C2 harness connector.
Measure the resistance of the Left Rear Speaker (+) and (-) circuits.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Left Rear Speaker (+) and (-) circuits for a short
together.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Amplifier in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
216
AUDIO
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