Hey guys, this is my first post here. I just wanted to share my experience with my LED switchback lights. I wanted to add a little flair to my current headlights without trying a projector retrofit or cracking open the headlights to add a little bit of flavor to them.
LED "switchbacks" seemed to be right up my alley. The specific pair I got were advertised as 20" long but they came about 14" long. Not a big deal, but they do only have leads on one end. They're waterproof and have 3M adhesive on the back. It's important to note these are also "sideshine" LEDs as normally LEDs are pointed straight up, these are pointed to one side, making them best suited for stuffing into cracks, or in my application, under the headlights.
I don't have a DRL module in my 2000 V6 mustang, and actually I couldn't even find a plug for one either. I grabbed the amp turn on lead from my head unit to push a 12v relay to flip on the lights. Kind of short-sighted on my point, they remain on when the radio is on and the car is off which is pretty crappy for a place like the drive in.
I made the mistake of not taking into consideration that the switchback control circuits don't have any LEDs in them. You'll see that the driver's side has a bit of a gap before the LED portion starts in comparison to the passenger's side.
The actual "switchback" funtion works like this: If there is voltage present for the whites, then the strip is powered. The instant the turn signal powers on, the whites shut off and the yellows blink with the bulb, albeit the incandescent bulb seems to lag behind the LEDs buy a faction of a second due to the filament heating and cooling. After sensing the turn signal lead is dead for more than 5 seconds, the whites come back on. There seems to be a slight bug with mine, if I initially power a strip with the turn signal on, the yellows stay on the entire time until they are powered off again.
At any rate, pictures should probably help. Sorry, I don't have a high end camera, but they are pretty representative of the real life results.