Speaker Circuit Malfunction - with Amplifier
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X3 connector at the amplifier.
- Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
- Left front low level audio signal (+) - terminal 12
- Left front low level audio signal (-) - terminal 10
- Right front low level audio signal (+) - terminal 9
- Right front low level audio signal (-) - terminal 11
- Left rear low level audio signal (+) - terminal 3
- Left rear low level audio signal (-) - terminal 1
- Right rear low level audio signal (+) - terminal 4
- Right rear low level audio signal (-) - terminal 2
- If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
- If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
- Ignition OFF, disconnect the X1 and X2 harness connectors at the amplifier.
- Ignition ON, test for less than 1 volt between each of the signal circuit terminals listed below and ground.
- Left front speaker output (+) - terminal 11 X2
- Left front speaker output (-) - terminal 12 X2
- Right front speaker output (+) - terminal 10 X2
- Right front speaker output (-) - terminal 9 X2
- Left rear speaker output (+) - terminal 2 X2
- Left rear speaker output (-) - terminal 1 X2
- Right rear speaker output (+) - terminal 3 X2
- Right rear speaker output (-) - terminal 4 X2
- Subwoofer speaker coil 1 output (+) - terminal 3 X1
- Subwoofer speaker coil 1 output (-) - terminal 4 X1
- Subwoofer speaker coil 2 output (+) - terminal 2 X1
- Subwoofer speaker coil 2 output (-) - terminal 1 X1
- If greater than the specified range, test both signal circuits of the appropriate speaker for a short to voltage.
- Ignition OFF, test for infinite resistance between each of the signal circuit terminals listed below and ground.
- Left front speaker output (+) - terminal 11 X2
- Left front speaker output (-) - terminal 12 X2
- Right front speaker output (+) - terminal 10 X2
- Right front speaker output (-) - terminal 9 X2
- Left rear speaker output (+) - terminal 2 X2
- Left rear speaker output (-) - terminal 1 X2
- Right rear speaker output (+) - terminal 3 X2
- Right rear speaker output (-) - terminal 4 X2
- Subwoofer speaker coil 1 output (+) - terminal 3 X1
- Subwoofer speaker coil 1 output (-) - terminal 4 X1
- Subwoofer speaker coil 2 output (+) - terminal 2 X1
- Subwoofer speaker coil 2 output (-) - terminal 1 X1
- If less than the specified range, test both signal circuits of the appropriate speaker for a short to ground.
- Ignition OFF, reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
- Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminals listed below and ground.
- Front door speakers - terminal 1 and 2
- Front tweeter speakers - terminal 1 and 2
- Rear speakers - terminal 1 and 2
- Subwoofer speaker assembly - terminal A, B, C and D
- If less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.
- If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the amplifier.
- If all circuits test normal, replace the appropriate speaker.