Originally Posted by ljjohns
When I replaced my K11 with my 2003 K1200LT, I took my Autocom Pro 7 Sport off of the K11, leaving the speaker interface on the K11 and purchasing a new one for installation on the K12. Both the old and the new were the "Part 67" (SML-S-CR-A) units with the toggle for turning the rear speakers on or off.
With the info provided on this forum, I had no problem re-installing the Pro 7 main unit on the K12; the power connections and placement were fine. I had no problem hooking up the PTT switch and cabling for bike-to-bike comms via a Kenwood TK3101. The intercom worked well, as did the bike-to-bike.
I am having problems--persistent ones--with the interface. I had purchased a new unit (same as the old one) and while in Wenachee in May, my friend and I attempted to install it. We were initially misled by the disparity between the illustration and the instructions surrounding them (the picture depicted a connection to a blue-grey wire while the text specified the blue-mauve wire).
When we corrected that, I could toggle to the top position, where the rear speakers (both of them) worked just fine (but there was no sound in the earphones); the other two positions gave me nothing at all.
I contacted Autocom America and we ran some tests: I can get input from a music source through the headphones, and of course the intercom and bike-to-bike work fine. Scott, the tech support guy, said that it must be a bad toggle switch and so they graciously sent me a new interface.
The bike's been in the shop for the last forty days (that's another story) and so today I attempted to reinstall the new interface. To be sure of myself, I called Scott and confirmed the wiring instructions (and those he gave me conformed to the positive/negative schematics in my Clymer). The results were the same: speakers work fine, the autocom controller accepts external music inputs and routes them to the headphones; the intercom and bike-to-bike all work. BUT I DO NOT GET ANYTHING FROM THE RADIO on the headphones in any of the three toggle positions.
So what have I done wrong?
Thanks to Chris (CWS) and an observation he made two years ago, the problem has been resolved, and the solution is worth noting for anyone who is attempting to install a switched interface between the radio and an Autcom unit.
While Autcom provides specific instructions for the K1200LT installation, they are faulty: the picture and the text differ on the wires to be cut or spliced (the picture shows a blue mauve while the text says blue grey); and it does not specify which side of the connector should be the site for these splices.
The critical point is this: there are three wires on each of the two leads from the toggle switch. The white one is soldered to the negative lead for each speaker (yellow and blue-grey). No problem there; check your Cylmer schematics for validation.
The connection of the other two leads, however, is critical: the black wire from the autocomm lead must be connected to the radio/source side of the cut yellow-blue and cut blue mauve wire while the red wire must be connected to the speaker side. This is made quite obvious in the instructions for the R-series bike on the previous page.
The black Autcomm wire is an input source, providing input either to the headphones through the lower toggle position or to the speakers thru the Autocomm red wire. The red wire is merely an output to the speakers.
If you connect them otherwise, the speakers will work fine in the up position because the circuit from the black to the red is complete (but backwards).
No input, however, will be provided to the headphones when the switch is toggled to headphones because the red wire circuit is opened (to disconnect the speakers in normal operation).
I'll communicate further with Autocom America's tech support on this issue, but until they clean up their instructions, folks need to be attentive.
Again, my thanks to Chris.