Hi Folks,
I took some good natured heat from some of you regarding this button on my truck, of which I did not know its function, and I was not obsessed with tracing it down to figure it out.
At 5:30AM this morning, I was driving in the dark on my way to my 90 year old Mom's house in Maine to pick her up and take her to a Doctor's appointment in Boston. These long early morning drives alone in the dark can be full of brain fog, as part of me is still asleep, but sometimes a bolt of lightning strikes, and my brain actually works in hyperdrive. Well, this morning, that damn button came back into my mind, and I suddenly knew exactly what that mystery button was installed for.
Some time back, I had a pair of Rough Country 8" LED light bars installed under the rear bumper of the truck to augment my backup lights. The stock incandescent backup lights were virtually useless, and the upgrade to LEDs in the stock tail light housing improved the backup lights' brightness, but not nearly enough for me to easily back out of my driveway in the dark, with stone walls on either side. The installation of these LED light bars provided me with more than enough light to illuminate anything behind me for a few hundred feet in any kind of weather.
It suddenly popped into my mind that the installer had mentioned that he also installed a dedicated on/off button in this LED light bars circuit, so that I could use these light bars as auxiliary work lights, in the event that I needed a strong auxiliary light source while on the road away from home, or simply for lighting for the back end of the truck to perform any work on the truck or any non-related project in the driveway. As soon as I got home, I went to the truck and flipped the switch on in the truck's portable garage, and sure as Hell, the entire back of the portable garage lit up like daytime.
Mystery solved. Better late than never.