Have been having trouble with CC cutting off while traveling. I use CC most all the time and it was getting aggravating.
I also found out the same switch feeds to electric steps, which wouldn't close at times, and foot brake booster pump.
I checked the play on the switch and the plunger had plenty of exposed play left for switch to operate. Its pretty hard to see the plunger but feeling the tip of plunger and the upper metal brake arm, WHICH FELT LIKE A FILE RUFF EDGE, that rides on the plunger had worn the plunger so it had a beveled edge thus causing the plunger to not operate the switch at times.
Because the plunger had plenty of play to operate the switch I placed on the metal arm a piece of sticky industrial velcro. It was enough to operate the switch so all switchable items work as they should.
I must tell you if you do this fix be very careful because when you push the brake pedel it could grab your finger and you have to really push that foot brake down to release your finger.
When the weather gets warmer I'm going to place a piece of sticky rubber with thickness about 3/16 to stick to brake arm in that way the plastic plunger will not wear and save the rest of plunger. My switch is mounted on a very solid piece of metal that does not loosen up, the switch must have some type of key lock on back side near brake arm to release from mounting.
If your out of warranty as I'm you will save yourself some money, if your in warranty you will save wear on the plunger.