Noise from AutoCom

[RedBeemer]

Even without the key in the bike, as soon as I plug the helmut into the system I hear electrical noise. The only good thing is that I can hear the brake booster working. I have the AutoCom mounted to the top of the air filter housing and wired direct to the battery. Any solutions to this problem will be met with a big smile. Thanks

[username]

are you confident it is well-grounded?

[dancogan]

If you're connected directly to the battery there shouldn't be a problem with ground. However, you might check the routing of the wiring, and move it away from other wires which might be causing the interference. ;)

[BradfordBenn]

What do you have conencted to the AutoCom audio inputs? Is the AutoCom bike powered? How about the other units? Your problem might just be a ground loop. Can you describe your configuration a little more? :type

[merrittgene]

What input source are you hearing? Is it the Autocom itself, or a tape player, two-way, etc? Do you have two helmets attached?

I ask, because mine whined really bad because of the power supply for my XM radio; disconnecting the radio killed the hum, pointing me to the problem. Wiring the XM radio to a 6v lantern battery proved that I was correct.

[RTRandy]

Had the same problem when I first had it installed on my RT. The electrical system on the bike is close and gives off RF. Autocom makes a filter for the problem and the good news is it works great with zero noise !!!
The bad news . . I think it was around $60.

Also Autocom suggest grounding the Autocom to the battery and not the frame. The following is what Autocom says on their website about picking up noise :
Can you ground to the frame or to a shared ground? Yes, but consider that it is no easier than grounding to the battery, and that while it may be a good ground today, it may not be tomorrow. This second point leaves the door open for aggravation (i.e., ignition noise) down the road. Do yourself a favor, ground to the battery.

If grounding to battery doesn't work, I would recommend their filter. I have cell phone, radar detector, bike to bike Kenwood GMRS and intercom for two up riding and it all works fine with the filter. Don't give up, it will work great once you isolate the problem.

[lorazepam]

16-20 bucks is a lot better than 60, but you can't say it is from autocom.

Check here (http://www.jcwhitney.com/webapp/wcs/stores/servlet/EndecaCategoryDisplay?catalogId=10101&Ne=100003247&N=111+100003247&langId=-1&tmplframe=EndecaCategoryView&section=body&storeId=10101&TID=8010257&ss=10101)

or here (http://www.crutchfield.com/S-6CezCYkYUIp/cgi-bin/ProdGroup.asp?g=181150&avf=N)

[syeager]

90% of the time, wiring everything back to the same point will take care of the problem. My Autocomm is wired to the battery directly, but my XM was plugged into the power outlet... the whine was just enough to get a good feel for what rev I was at if the radio was turned up. Wiggling the power plug changed the noise.

Anyway, powering the XM from back at the battery took care of it. Rewiring XM power: $0. No annoying helmet noise: priceless.