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Power antenna problem

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Old Jun 6, 2018 | 09:22 PM
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Default Power antenna problem

The power antenna has been killing my battery. When I turn the car off the antenna retracts and retracts and retracts forever even after it's all the way down. Two questions: 1. where is the easiest place to disconnect the antenna wiring 2. Which fuse controls the antenna and where is it located. Thanks, Bob
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Old Jun 7, 2018 | 08:53 AM
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Pass side in the trunk small panel unplug the antenna motor. The radio works fine with the antenna down
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Old Jun 7, 2018 | 08:58 AM
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Moved to C5 Tech.
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Old Jun 7, 2018 | 10:22 PM
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Tried all of the above. Disconnected wires going to the antenna (in the trunk), pulled the antenna fuse and pulled the radio fuse. I can still hear a repeating very quiet dull thud that sounds like a relay cycling on and off and don't have a clue where to go next. If the battery is dead again tomorrow morning it will be time for professional help.
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Old Jun 12, 2018 | 04:02 PM
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Originally Posted by claf
The power antenna has been killing my battery. When I turn the car off the antenna retracts and retracts and retracts forever even after it's all the way down...
Originally Posted by claf
Tried all of the above. Disconnected wires going to the antenna (in the trunk), pulled the antenna fuse and pulled the radio fuse. I can still hear a repeating very quiet dull thud that sounds like a relay cycling on and off and don't have a clue where to go next...
Unplugging the power antenna connector in the trunk should have stopped the antenna from "retracting forever". You didn't corroborate it, but the antenna can't continue rectracting without power.

The antenna relay and the up and down switches (that also provide the cut-off function at the end of each travel) are integral components of the antenna assembly. Your description of the original problem seems to point to an internal failure in the power antenna.

Take a look at the power antenna schematic for more details:



Separate from the antenna issue, you now describe that after unplugging the antenna connector and removing the antenna and headunit fuses you are hearing what seems like a cycling relay. Couple of questions:
  • Were you able to locate from which relay the sound was coming from?
  • Did you check if the sleep-mode current was within range after unplugging the antenna connector and removing those fuses?

Last edited by GCG; Jun 12, 2018 at 04:23 PM.
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Old Jun 20, 2018 | 10:56 PM
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Is there a source for a replacement Bose amp relay (item #46 in the foot well fuse panel) ?
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Old Jul 9, 2018 | 10:24 PM
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OK, you made a believer out of me. I was very hesitant to pin my hopes on a stupid faulty relay but for four bucks how could I go wrong. I replaced the relay that controls the Bose amp , connected the antenna back up and replaced the fuses that I had pulled out. Now the radio works, the antenna works and the battery no longer goes dead ! I would have NEVER found that solution in years of searching. You have my gratitude for a smart diagnosis and repair suggestion. Bob C
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