New autocom, interference from bmw nav 2.

[Jay12329]

I've replaced my autocom today to a new kit3 so i can use a radio.
In doing so I've had to replace the sat nav cable that was used on my old set up as it was wired in an odd way.
But now I get a buzzing that becomes a harsh 'noise' noise when you press a button on the sat nav.
I've noticed the old plug had one black ring where the new one has two.
Do I need a special lead for the BMW navigator 2?
Ta
J

 

[beemerboy9]

I've replaced my autocom today to a new kit3 so i can use a radio.
In doing so I've had to replace the sat nav cable that was used on my old set up as it was wired in an odd way.
But now I get a buzzing that becomes a harsh 'noise' noise when you press a button on the sat nav.
I've noticed the old plug had one black ring where the new one has two.
Do I need a special lead for the BMW navigator 2?
Ta
J

I'd give the factory a ring - I'm concerned about the "wired in an odd way" .
Does the new cable have a black isolator box that must be used with bike powered sat-navs to avoid ground loop noise? Did the old cable as well?
The Autocom should be earthed to the battery negative lead directly.
Which port on the Autocom (presuambly a Kit 300?) are you using - you could try AUX3 rather than AUX4 and see if you still get the buzzing.
The output from the Nav2 is mono (one-ring on the plug).

 

[Jay12329]

Ah that may be the issue. I've just used a standard wire. The old one had a box but was then wired into the radio port on the autocom rather than one of the 3.5mm aux sockets. Which i considered odd, may not be so strange now.
Yes its a kit300, and I tried moving port with no difference. I think it looks like the cable.
Strangely my house mate fitted the same kit to her bike at the weekend with a bike powered zumo, she is getting interference with increases with engine reves. could this be the same issue, showing in a less severe way?
ta
J

 

[beemerboy9]

Your housemate will definitely definitely need a cable with an isolator in it - without it you will get rev-dependent intereference. Now that it is wired in, the easiest thing to do is to place a 1286 isolated music mixer between the existing cable and the Autocom AUX3 port, rather than using a new 1314 cable. Things get more complicated if you want mobile phone functionality as well.

 

[GSrich]

Ideally our parts 1285 and 1294 should be used, these will plug into the AUX4 socket which is the main GPS connection on your Pro, the AUX2 and 3 sockets are mainly there for music and run a stereo connection not mono.

Rich