Question about Harley Davidson 426290 AM/FM Radio

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06 ultra radio no sound from speakers only headset.

My 06 ultra has had radio problems after the first year of riding. It has been fixed 2x by harley. I put a new speaker selector switch in and the radio played from the speakers for ten minutes, then it went out again and only has sound through the headset. When this sound problem started it would come back on if you moved the position of the speaker switch and work for 5 minutes and then lose sound until you moved the speaker switch. Now it only works through the headset I don't know if the switch I bought is bad or if there is something else going on. Thanks, Razz

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  • srivera4336 May 26, 2009

    Same problem. Harley replaced radio twice saying it is the amplifier on the radio. I am having the same problem, having to cycle the speaker switch. sometimes the speakers turn on, usually they do not. I am going with aftermarket. Possibly, or maybe get radio fixed at, as my warranty is expired



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Switch is fine. You have a damaged audio circuit caused by vibration. Check the bikes mounting brackets. probably broken. The radio will need to be repaired.

Posted on Aug 15, 2009


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1 Answer

2008 harley ultra classic

Switch is fine. You have a damaged audio circuit caused by vibration. Check the bikes mounting brackets. probably broken. The radio will need to be repaired.

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Sounds like it may be vibration damage to the main board.
There are, however, too many possibilities and questions.

Give Iron Cross Audio a call and have them walk you through the options.

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if the radio still has power the audio amplifier ic in your radio has failed.
take your radio to an electronics repair shop or, replace the radio; this not something you can fix unless you know how to use an oscilloscope.

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07 units are notorious for vibtation damage. 08 and later have an anti vibration modification. You need to check your fairing brackets and make sure they are secure. Either way, the radio is repairable. Iron Cross Audio can do it and also install the anti-vibration modification. (

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A couple potential problems. If you have a speaker / headset selector switch, it may be bad. The circuit in the radio that responds to that switch may have experienced electronic overstress ans blown a component or 2. Finally, the audio circuit may have experienced some vibration damage. These are all repairable conditions. For more info on repairs of these units, contact Iron Cross Audio (

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