Rear Speakers Shorted Together or to Ground

REAR SPEAKERS SHORT TOGETHER OR TO GROUND

WHEN MONITORED
When the DRBIII(R) performs the Speaker Output Test.

SET CONDITION
Each Amplifier rear channel is shorted together or to ground.

POSSIBLE CAUSES
- Right rear speaker
- Left rear speaker
- Rear speaker circuit shorted to ground
- Rear speaker circuits shorted together
- Amplifier

1. RIGHT REAR SPEAKER





NOTE: The fault condition must be present to continue diagnosis. Use the DRB III to perform the Amplifier Pre-test to verify the fault condition is present before continuing diagnosis.

Turn the ignition off.
Access and disconnect the Right Rear Speaker harness connector.
Turn the ignition on.
Using the DRB III, perform the Amplifier Pre-test.

Q: Is the fault condition still present?

YES: Go To 2
NO: Replace the Right Rear Speaker. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2. LEFT REAR SPEAKER
Turn the ignition off.
Access and disconnect the Left Rear Speaker harness connector.
Turn the ignition on.
Using the DRB III, perform the Amplifier Pre-test.

Q: Is the fault condition still present?

YES: Go To 3
NO: Replace the Left Rear Speaker. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3. REAR SPEAKER CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Access and disconnect the Right Rear and Left Rear Speaker harness connectors.
Disconnect the Amplifier C2 harness connector.
Measure the resistance between ground and each of the 4 Rear Speaker circuits.

Q: Is the resistance above 1000 ohms for each of the measurements?

YES: Go To 4
NO: Repair the Rear Speaker circuit that measured below 1000 ohms for a short to ground. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

4. REAR SPEAKER CIRCUITS SHORTED TOGETHER
Turn the ignition off.
Access and disconnect the Right Rear and Left Rear Speaker harness connectors.
Disconnect the Amplifier C2 harness connector.
At the Amplifier C2 harness connector, measure the resistance between the Left Rear Speaker (-) circuit and the following circuits: Left Rear Speaker (+), Right Rear Speaker (-) and Right Rear Speaker (+).

Q: Is the resistance above 1000 ohms for each of the measurements?

YES: Go To 5
NO: Repair the Rear Speaker circuits that are shorted together. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

5. REAR SPEAKER CIRCUITS SHORTED TOGETHER
Turn the ignition off.
Access and disconnect the Right Rear and Left Rear Speaker harness connectors.
Disconnect the Amplifier C2 harness connector.
At the Amplifier C2 harness connector, measure the resistance between the Left Rear Speaker (+) circuit and the following circuits: Right Rear Speaker (-) and Right Rear Speaker (+).

Q: Is the resistance above 1000 ohms for each of the measurements?

YES: Go To 6
NO: Repair the Rear Speaker circuits that are shorted together. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

6. REAR SPEAKER CIRCUITS SHORTED TOGETHER
Turn the ignition off.
Access and disconnect the Right Rear Speaker harness connector.
Disconnect the Amplifier C2 harness connector.
At the Amplifier C2 harness connector, measure the resistance between the Right Rear Speaker (+) circuit and Right Rear Speaker (-) circuit.

Q: Is the resistance above 1000 ohms?

YES: Replace the Amplifier. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Repair the Rear Speaker circuits that are shorted together. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test