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.
- If all circuits test normal, replace the amplifier.