[Snappa]

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.

 

[Snappa]

You can still verify wether or not you need to reprogram it without the button. That circuit is live regardless if it's turned on via the interior button or not. honestly the best route to go if you are trying to save money and have decent fogs is to get the set off eBay for $49.99. Many users have them and best of all you can get them easily replaced for free of you run into any issues because this is just how the games goes on eBay. The sellers of these accessories will get afraid of getting negative feedback and will send you free replacements while letting you keep the new ones. This is what happened to me. I wasn't pleased with one little thing and now I have 2 kits for just 49.99. Many users on here have those same kits.one of the names the kit goes under on Amazon and eBay is Spider Auto. Then you can easily find the factory plug and play switch on eBay or at a junk yard. I found mine on eBay from a junkyard that sells parts online for about. So you can give yourself a 100 percent factory installation for less than $100, not even.

 

[Snappa]

I do believe I had the switch before I tested it. I went out just now to verify and you do have to have it on via the interior switch first. i guess in my case I was just so anxious to get the fog lights that I ordered the switch first before the serperate $49.99 kit because if none of it worked I knew I could return it all hassle free. The only switch plus eBay fogs are a killer combination. You can even find an 18-20 gauge wire terminal so you can actually install it into the backside of the fuse box instead of using an add a fuse, making it just like factory. No way am I paying close to 400 for some fog lights. These dealerships are crazy.