I've been testing a few ideas for some amber/yellow led switchbacks. All of the true switchback led's that have white running lights that turn off when the turn signals blink have been in the $40 - $60 range per pair & I just don't see anyone spending that kind of money for a couple led's... so I've been looking at ways to make something similar of my own. Right now, I've got one made up & I'll be testing it out on my truck sometime this week hopefully. As of now, this mod will probably only work for the older trucks that have 3 wires coming from the front turn signals. Like most of my mods, this will be fairly simple to install & I'll work up a detailed install manual to go along with it. There may be 2 or more versions of this mod, 1st will be a true plug-n-play version that has everything pre-made and connected, all you'll need to do is unplug your old bulb socket & plug the mod between. 2nd will be a quick connect version where you'll use scotchlok type connectors to tap into your existing wiring. A pair of amber/yellow led's will be included in every version. With the testing I've done in the shop with my 12v power supplies, it works great. The white led's come on with the parking lights (looks especially nice with clear style corners) and when the turn signals come on, the white led goes out and the amber led's come on, when the turn signals go off and so forth. When the parking lights are not on (daytime use) the white led's do not come on at all, but the amber led's work for turn signals/hazards. These will be for a rather limited market for older trucks with clear style corners... not to mention that I'm searching for more OEM pigtails & bulb connectors. But I'm hoping to keep the pricing below that of the "name brand" switchback led's. Just wanted to see if there's an interest in something like this, any ideas, comments, etc.