With Amplifier
WARNING: This page is about a different car, the 2010 Saturn Sky and 2010 Pontiac Solstice. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
- Radio ON, test for 5.0-7.5V between the appropriate signal circuit terminal listed below and ground.
- Left front low level audio signal (+) terminal 1
- Left front low level audio signal (-) terminal 2
- Right front low level audio signal (+) terminal 10
- Right front low level audio signal (-) terminal 9
- Left rear low level audio signal (+) terminal 4
- Left rear low level audio signal (-) terminal 3
- Right rear low level audio signal (+) terminal 11
- Right rear low level audio signal (-) terminal 12
- If less than the specified range, test the appropriate 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 appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
- If all circuits test normal, replace the audio amplifier.