Captiva

Radio Poor Reception

Note: Use a test mast aerial to quickly check for poor vehicle aerial operation. Unplug aerial lead-in connector from radio receiver and plug a test aerial into radio. Make sure the test aerial base is grounded to the vehicle chassis and keep hands off the mast. Check radio reception in an area away from electrical interferences. Tune to several weak and strong AM and FM stations. If the radio reception improved, the problem exists with the vehicle aerial and/or lead-in cable. If the reception is still poor, refer to Audio System Trouble shooting Hints.

Warning: Refer to Battery Disconnect Warning in the Preface section.

Note: Always zero out the DMM before taking a resistance measurement in order to ensure an accurate reading.

1. Disconnect the negative battery cable.
2. Disconnect the aerial lead-in connector from the radio receiver.
3. Measure the resistance from the negative battery cable to the coaxial cable, outer conductor, connector.
4. The resistance measured should be 0.2 ohm or less.
5. Test the following when the resistance is greater than 0.2 ohm.

•	Base of the aerial for a poor connection to body ground

•	The coaxial cable interconnects for a poor connection or corrosion.

•	Test for an open or high resistance from the battery negative cable to the body.