i pulled the covers off and it appears that the 2012 USA version ClockSpring (CS) has 10 channels--on the stationary side 4 are dedicated to the SRS/airbag with a separate yellow connector and yellow wires. The remaining 6 go thru a white connector, but only 4 of those were populated:
pin 1, blue wire, this is the signal return (-) for the left thumb radio and phone buttons, designated REM-.
pin 2, no wire populated, but the CS pin connects to the cruise control switch connector on the right thumb.
pin 3, same as pin 2.
pin 4, gray wire, this is the button-Illumination power supply for the LEDs, designated Ill+
pin 5, green wire, this is the signal (+) for the left thumb radio and phone buttons, designated REM+
pin 6, white wire, is +12V all the time, routed to the Horn button.
On the moving side (steering wheel) of the CS, there are two 5-pin connectors, one carries the 4 SRS wires plus the Horn, the other has one wire for Illumination, a pair for the Radio/Phone, and a pair for the Cruise Control.
The radio switch and phone buttons are tied together to create a voltage divider circuit. Whenever a button is pressed it causes a corresponding voltage to be sensed at the radio. The right thumb switch has a similar voltage divider network, but since we don't have an ECU for cruise control, there was no need to populate wires from the Stationary side of the CS.
The Lancer cruise control thumb switch fits perfectly and the buttons light up with the headlights. i'm thinking i could find the right terminals to populate the CS in order to use the Coast button on the Cruise to switch the gear position to Neutral, or switch to B mode for max regen, etc...
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