Circuit/System Testing
WARNING: This page is about a different car, the 2007 Saturn Sky. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Perform the Audio System Troubleshooting Hints to properly identify the customers concern before using this diagnostic
- With the ignition OFF, disconnect the antenna cable from the radio. With a DMM, verify there is less than 0.2 ohms between the negative battery cable and the coaxial cable metal outer shield.
- If greater than 0.2 ohms, test the antenna mast base for proper ground to the body. If antenna is properly grounded, replace the antenna coax cable.
- Disconnect the coax cable from the antenna mast. With a DMM, verify there is less than 3.5 ohms between the radio end coaxial cable conductor and the antenna end coaxial cable conductor.
- If greater than 3.5 ohms, replace the coax cable.
- If no problems are found with the coax cable or the grounding of the antenna mast, replace the radio.