Which wire is auto volume??? - Road Glide Forums
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post #1 of 6 (permalink) Old 01-14-2013, 05:55 PM Thread Starter
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Which wire is auto volume???

I have what I believe is a ground hum through the radio that goes up and down with speed. How do I cure that?? I cannot find the wire on the diagram.


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post #2 of 6 (permalink) Old 01-14-2013, 07:38 PM
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Are you running OEM spark plugs? Some after market plugs are missing the resistor and will cause feedback through the radio.


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post #3 of 6 (permalink) Old 01-14-2013, 09:27 PM Thread Starter
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Yes i am. All stock under the tank lol.


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post #4 of 6 (permalink) Old 01-15-2013, 01:53 AM
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Talking

I'm no audio guru, but I understand that the ground needs to be as short as possible (or it will induce the hum.)

Have you added any equipment or changed the length of your grounds?

Beavz

'11 RGU

Bug guts look better than dust on a bike... just sayin'
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post #5 of 6 (permalink) Old 01-15-2013, 05:37 AM
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Quote:
Originally Posted by Clutch1 View Post
I have what I believe is a ground hum through the radio that goes up and down with speed. How do I cure that?? I cannot find the wire on the diagram.


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Pin 9 of the 23 pin connector (J1850 data from the ECM) controls auto volume. It's a data line, not audio, so would not have anything to do with your issue.
The increase / decrease with the speed of the bike would probably be ignition noise getting into the ground. Check all your radio and battery grounds.
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post #6 of 6 (permalink) Old 01-15-2013, 10:20 AM Thread Starter
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Will do. Thanks. I havent done anything to the bikes audio. Te hum just crept in last fall on the last two rides.


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