[ChevyGuy]

The short answer - you may. Some cars haven't needed it, some do. I don't recall if there's a pattern to figure out where you fall.

 

[ChevyGuy]

If you know anything about electrical on a car, this is an easy one. If you don't, it's still easy. To find out if your bcm needs the flash or not, open up the fuse panel under the hood.Locate the fog lamp fuse (can't remember which one it is but it isn't hard to find). Take any 12v light or a test light and connect one side of the light to top of the fuse (one of the two exposed metal parts on top) and then the other lead of the light to any nearest body ground source. If the light lights, you're good. If not, you will need a flash.

Can you explain how that works? If it's like the high-beam circuit I looked up, the fuse won't have power until the fog light relay is on. And that won't happen until you push the fog light button. If the fuse is before the relay, it would have power all the time - unless you're saying there's a fusebox modification that goes along with the reflash.

 

[ChevyGuy]

I do believe I had the switch before I tested it.

Ah, that makes sense. You were testing before pulling the trigger on the more expensive part.

 

[ChevyGuy]

I have a 2014 cruze 2lt and I had my installer put in some LED foglights direct to the daytime running lights, they worked good until 1 night they stayed on ALL NIGHT! I could not get them to turn off and didn't have the space or tools to see what could be causing it. As of now they don't turn on anymore, could it be that it blew a fuse? or what would cause them to stay on all night and then not turn on again?

IIRC, the stock 2014 doesn't have DRLs, but uses the low-beam headlights. As such, I can't even guess what may be going wrong. You'd have to know how the added fog lights work.