Join Date: Jun 2013
Location: Muskegon, MI, USA
Re: Motorrad GPS III install on K1200LT 91
Yes I know I am replying to a very old thread, but it will put information out there for others trying to do this.
The purple is "speed" and is only used by the 2005+ bikes for correcting the accuracy of the Bike Computer's calculations.
to get audio you have to CUT your wire a lot higher. up there you will find several wires, you want red and black for power, and the yellow and white.
Yellow and White are the audio out. be sure to solder your new wires to these and then use double wall heat shrink tubing to seal it to make the connection waterproof. You want to run the power to switched power so it goes off when you turn off the bike. The audio out is not speaker level but line level, it needs amplification to drive headphones. IT works ok With autocom inputs.
Currently riding a 2003 K1200LTC