GPSinput device.


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canuck623
Posts: 107
Joined: Wed Jan 09, 2013 2:50 pm
Location: Glendale, Arizona
Motorcycle: 2008 GL 1800 Level 3

GPSinput device.

Postby canuck623 » Sun May 01, 2016 11:46 am



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?


2008 GL1800
1990 GL1500
1986 GL1200
1983 GL1100
1982 CBX 1000
1972 CB750
1966 305 Dream

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WingAdmin
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Posts: 17050
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: GPSinput device.

Postby WingAdmin » Sun May 01, 2016 1:33 pm

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?

User avatar
canuck623
Posts: 107
Joined: Wed Jan 09, 2013 2:50 pm
Location: Glendale, Arizona
Motorcycle: 2008 GL 1800 Level 3

Re: GPSinput device.

Postby canuck623 » Sun May 01, 2016 7:07 pm

Disconnecting the GPS had no effect on the unit. Yes the bike does have HID headlights.
2008 GL1800
1990 GL1500
1986 GL1200
1983 GL1100
1982 CBX 1000
1972 CB750
1966 305 Dream

User avatar
WingAdmin
Site Admin
Posts: 17050
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: GPSinput device.

Postby WingAdmin » Sun May 01, 2016 10:34 pm

canuck623 wrote: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.




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