Dodge Ram Truck 1500-2500-3500. Manual — part 260

RIGHT FRONT INPUT NO ACTIVITY

For the Audio system circuit diagram (Refer to 8 - ELECTRICAL/AUDIO - SCHEMATICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

•

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

1.

(+) CIRCUIT SHORTED TO GROUND

NOTE: 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 right front speaker (+) circuit.

Is the resistance below 1000.0 (1K) ohms?

Yes

>> Repair the speaker (+) circuit for a short to ground.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Go To 2

2.

(-) CIRCUIT SHORTED TO GROUND

Turn the ignition off.

Disconnect the Amplifier C1 harness connector.

Disconnect the Radio harness connector.

Measure the resistance between ground and the right front speaker (-)
circuit.

Is the resistance below 1000.0 (1K) ohms?

Yes

>> Repair the speaker (-) circuit for a short to ground.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Go To 3

8A - 42

AUDIO - ELECTRICAL DIAGNOSTICS

DR/DH

RIGHT FRONT INPUT NO ACTIVITY (CONTINUED)

3.

OPEN SPEAKER CIRCUITS

Turn the ignition off.

Disconnect the Amplifier C1 harness connector.

Disconnect the Radio harness connector.

Measure the resistance of each right front speaker (+) and (-) circuit between the Radio and the Amplifier.

Is the resistance below 5.0 ohms for each circuit?

Yes

>> Go To 4

No

>> Repair the speaker circuits for an open.

Perform BODY VERIFICATION TEST - VER 1.

4.

AMPLIFIER

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 right front speaker circuit at the Amplifier
C1 connector.

NOTE: NOTE: Perform this test on each right front speaker circuit.

Is the voltage at least 120mV AC (0.12 VAC) on each speaker circuit?

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.

DR/DH

AUDIO - ELECTRICAL DIAGNOSTICS

8A - 43

LEFT REAR INPUT NO ACTIVITY

For the Audio system circuit diagram (Refer to 8 - ELECTRICAL/AUDIO - SCHEMATICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

•

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

RADIO

AMPLIFIER

1.

(+) CIRCUIT SHORTED TO GROUND

NOTE: 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 rear speaker (+) circuit.

Is the resistance below 1000.0 (1K) ohms?

Yes

>> Repair the speaker (+) circuit for a short to ground.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Go To 2

2.

(-) CIRCUIT SHORTED TO GROUND

Turn the ignition off.

Disconnect the Amplifier C1 harness connector.

Disconnect the Radio harness connector.

Measure the resistance between ground and the left rear speaker (-) circuit.

Is the resistance below 1000.0 (1K) ohms?

Yes

>> Repair the speaker (-) circuit for a short to ground.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Go To 3

8A - 44

AUDIO - ELECTRICAL DIAGNOSTICS

DR/DH

LEFT REAR INPUT NO ACTIVITY (CONTINUED)

3.

OPEN SPEAKER CIRCUITS

Turn the ignition off.

Disconnect the Amplifier C1 harness connector.

Disconnect the Radio harness connector.

Measure the resistance of each left rear speaker (+) and (-) circuit between the Radio and the Amplifier.

Is the resistance below 5.0 ohms for each circuit?

Yes

>> Go To 4

No

>> Repair the speaker circuits for an open.

Perform BODY VERIFICATION TEST - VER 1.

4.

AMPLIFIER

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 rear speaker circuit at the Amplifier C1
connector.

NOTE: NOTE: Perform this test on each left rear speaker circuit.

Is the voltage at least 120mV AC (0.12 VAC) on each speaker circuit?

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.

DR/DH

AUDIO - ELECTRICAL DIAGNOSTICS

8A - 45