Clicking from under the dash

Hi all, This is my first post.

i browsed through the forum to find an answer to a problem i have been having for a while with my aurora. Just this summer i started getting a clicking noise under the dash, the weather was an unbearable 100+ for a few weeks straight. I took it to the mechanic and he replaced my LCM. it didn't do any good.

The adjacent problem was the head and tail lights would flash intermittently while parked or maybe even while driving. i know the noise occurred while driving.

So to fix the problem i started pulling wires from the 16 pin connector on the LCM. and found one of the wires was the culprit. I think it was #13 and it was grey, but i am not sure. I don't have the necessary tools to trace the wire and find out where it leads too. Also, getting skems for this car is a real pain. My LCM is fine and the car has been running like a dream for almost 5 months. I was wondering if anyone knew what the real cause of the problem is and any way to get it fixed.

Bad multi-function switch.

Bad multi-function switch.

Right on guys.
I had this replaced...over $400!!!
I think this is the turn signal, bright lights, exterior lights, and criuse controls.