This will be a long-winded thread. Will be sure to do a tl;dr at the bottom. First things first. I have wanted to do the Quad Turn/Tail Modification for some time, also wanted to incorporate LEDs into the mod/upgrade. So a little background.... A couple links to previous mods/discussions on Quad S/T/T Mods http://gmtnation.com/forums/threads...s-on-the-cheap-halogen-and-led-verified.3155/ http://gmtnation.com/forums/threads/tb-quads-plus-turns-a-new-solution.1574/ http://gmtnation.com/forums/threads/gmt-360-quad-tail-lights-modification.11821/ My initial install I placed some StrobesNMore LED HAWs into the reverse section of my tail lights, in Blue/Amber. 8 diodes in each Hideaway, aka HAW (they look distorted from lens and reflector, no warping on them) Video: Of course I was not satisfied, and then the Feniex Cannon (now called Cannon 120) came out with (12) 4-watt diodes in each HAW, and just swapped the SNM HAWs out for those. Soooooo I have also wanted to incorporate one of the methods to get the Quad Tail Lights, but so much work to tie in all these different items, and myself not having the patience to screw around with any of the methods I have found between GMTN and originally on the Voy. I had ORIGINALLY wanted to get a clear lens tail light, replace the running/Brake light with a Red LED, the Turn light with an Amber, and then have clear reverse, but put an additional BLUE LED in the reverse section, to keep the Blue/Amber alternating display. Well the only way to accomplish this was to purchase an Aftermarket LED tail light replacement unit, remove the lens, and resecure it to a stock housing, since no replacements were made with stock type reflectors with clear lenses. Not cost effective, time consuming, and I would almost definitely screw the whole thing up. In doing my research for this alternate option (Quad Turn/Tail plus tail light replacement), here are the methods I wish to employ, and I hope the techies/electricians here can guide me through, telling me what is correct, wrong, feasible, and/or just stupid. I want to start by purchasing the correct adapter to come off the factory harness which I believe I found from a previous thread, the Delphi GT150 MAF, to avoid cutting the factory harness. The LED HAWs will be replacing the bulbs and the board at the back of the housing. I am going to be using the Feniex Cannon 360. Those not familiar, the Cannon series have 3 inputs, each sequentially overriding the previous. So if there is power to Input 1, and power remains to that input, once power is applied to Input 2, control is overridden, and the pattern selected for Input 2 will display (same for Input 3, overriding Input 2). In figuring out the wiring sequence for these, I needed to know how the control for the tail lights worked. Are the signals coming from the BCM? I know the flasher relay is under the dash, and to avoid Hyperflash, I am going to replace it with the Novita LM486. All inputs would have to have to power 2 LED HAWs to create the quad function. If I took the inputs from the factory harness, for Running/Parking light, and wired it to Input #1 on the Cannons, I Would have to set the pattern to steady burn, with only half the diodes illuminated, AND use a resistor to make that even more dim (I have found some people using different resistors, one person used a 3W 75Ω, another used a 0.5W 33Ω resistor). For Input #2 I would wire a separate control wire to activate the warning pattern so that it would override the parking light. Input #3 is going to be the troublemaker. Since I am limited to the 3 inputs, this would have to control Brake AND Turn, and I obviously want these to override Warning patterns. I need to figure out how to accomplish this. Even using 2 separate power sources (brake and turn) into the single input, the power from the brake would be constant and not allow the turn to display. Maybe some setup with relays? The only SIMPLE solution would be to just wire them up to how the stock lights are set up, Top light doing Parking/running, Warning, and Brake, center light running and turn, but I would be sad I could not get the Quad S/T/T. What other option(s) could I utilize? Modifying the tailboards is out, keeping them in and the LED HAWs would not leave enough room behind the housing. Edit: Never really thought of/considered this as a potential option, does anyone think this would be of any assistance? http://www.able2products.com/update/11_1005stt_v1.htm http://www.able2products.com/pdfs/11_1005stt_instructions.pdf I thank those who actually read this whole thing, your eyes are probably bleeding, and have a headache. tl;dr 1) Want Quad S/T/T. 2) Doing full LED Hideaway Warning light replacement. 3) LED HAW's only have 3 inputs. 4) Will purchase proper turn flasher replacement module to avoid hyperflash. 5) Need to figure correct resistor to dim down the HAW for park/run lights. 6) Need to figure how to get from factory harness, to having turn signal on one side of vehicle disable brake for same side, in which case some problems alleviated; or get this to work BEFORE factory harness, seeing as (see #7 below)... 7) Modifying board on back of tail light impractical/impossible. Thanks for any and all input, hope I provided enough information, will happily provide any more I can if needed!!