[RacerX1166]

Cold can be tough on electronics in a number of ways that you might not have thought possible. Electromechanical items, for example, tend to be copper and plastic. Like most materials, both expand and contract with heat and cold which will cause the points where the copper contacts to rub back and forth just a little bit (called micromotion) in each cycle. After a few times, a fine layer of fretting corrosion will accumulate on the interface and cause the contact resistance to soar. Sitting outside, your truck's interior does warm up in the sun, despite the cold temps.

This may sound a bit far fetched but if it weren't true, I wouldn't have had to (figuratively) write a check to swap out a bunch of head units in a certain model of pickup truck.