How do you hook up fog lights on a 2006 freightliner Columbia?

Answer 1

Depends on how you want to go about it. If this vehicle came with fog lights, they're routed through the ECM, and that process requires you to have the corresponding software... if you're up for spending a few thousand on it, go for it.

If you're trying to wire up fog lights in a vehicle which didn't originally have them, I would find an empty slot in the vehicle's fuse panels. From there, run a wire (I'd recommend at least 14 gauge, although 10 would probably be better) to a switch in the dashboard... you can either get a two pole, single throw switch, or, for about $5, you can get a single throw, three pole switch which lights up when engaged... the only difference is that you have to run a ground from the switch to get it to light up when engaged. The wire from the fuse will go to the switch input, the wire from the switch output will go to the fog lights. From the fog lights, you'll need to find a good ground to connect to the fog lights.

Just as an aside, don't be one of these rookies who run their fog lights when there is no fog. Unless you're driving a 2005 or later Volvo VNL, the headlights are more than adequate.