Originally Posted by MichaelMulroy
I could really use some help identifying what each of the wires hook to in my seven pin lead from the Autocom to the headset. I am looking to connect ear plugs to my passanger outlet.
I have this drawing laying around and I believe it is one I drew up when I had the AutoCom 1187 cable box apart.
Looking at the pin-end (male) end of the cable and positioning the widest gap between the pins down (along with the large nub on the rubber connector) and counting the pins clockwise from the bottom 7 o'clock pin as pin #1 (no connection), Pin #2 goes to the tip of the 3 conductor stereo mini-plug. Pin #3 (about 10 o'clock position) goes to the middle conductor of the mini-plug. Pin#4 is Ground and goes to the upper part (nearest handle) of the 3 conductor stereo mini-plug. The metal part around the pins is not connected to anything (it isn't grounded). Pins #1, 5, 6, 7 aren't used. I believe those are for the mike and the ambient noise mike that controls the Auto-Volume which is in the rider's helmet. I don't know the pinouts on that as they pass through the circuit board in the 1187 cord.
Also, AutoCom added a small 1/4 watt 68 ohm resistor in series with a 100uf (10 volt) electrolytic capacitor on each of the leads to the tip and the center conductor of the stereo mini-plug. I may be mistaken about the 100uf value though as I didn't write that one down for some reason(?). I did note the polarity of the capacitor is with the negative lead of the capacitor going to the stereo mini-plug in both instances.
When I tried making mine up (dealer didn't have one at the time) it got a bit dicey with the stereo phone's in-line jack that I had (Radio Shack). If I twisted the cable, it would short out against another pin or wire and the thing's audio would cut in and out at the worst times. I didn't use the resistor or capacitor either that I later found in the AutoCom black box. Radio Shack also didn't have the 7 pin DIN, only a 5 pin. I got rushed and cut off a straight AutoCom 7 pin cord to get what I needed. I finally gave up and got the 1187 AutoCom cord later and dissected it to see what they did.