GPSinput device.

[canuck623]

Couldn't find an email address so I will ask here. I have installed a couple of GPS input devices that I purchased through this site and they have both worked fine but I have a question about the second one. When it was hooked up the GPS worked through the intercom but there was a very audible hum through the headset. I moved the unit around and I could find a place in the pocket that it cut the hum to almost nothing but it never quite all went away. The first one I did there was no hum at all. I tried turning off the cruise and even wrapped the unit in tin foil to see if it would help but nothing seemed to work other than moving the unit itself to the right side of the pocket and holding it there with tape. Any ideas?

[WingAdmin]

That's strange, it's the first report I've had of such a thing. There IS a transformer inside that will act as an inductor and pick up EMI if it is near enough to a source of EMI.

If you disconnect the GPS from the unit, does the hum go away?

If the hum remains, the only thing left to do is what you have already done - move the unit away from the source of the EMI.

Are there any aftermarket parts installed on the bike? HID lights with ballast boxes, perhaps?

[canuck623]

Disconnecting the GPS had no effect on the unit. Yes the bike does have HID headlights.

[WingAdmin]

Disconnecting the GPS had no effect on the unit. Yes the bike does have HID headlights.

Check the location of the HID ballasts - they are notorious for putting out a lot of noisy interference. Try to keep the GPS Input as far away physically from them as you can.

Try pulling the fuse for your headlights - if the noise goes away, then you know that's the source of it.