I'm having problems trying to use on of those electronic adapters that lets you use a trailer with only 2 filaments per side, on a car that has separate wires for brake, RT and Left. That would be just like my build which has a separate wire for brake, and one for right turn and one for left signal, but using only two filaments per side...like a trailer I hooked up the car exactly by the writing on the unit. I've got brake wire going in, r and l going in, and tail going in, and a ground wire properly grounded. The other end only has 4 wires out. One for tail, one ground, on R and one L, just like what I need for my twin 41 chevy lights. I only get taillights working. Yes I have new bulb contacts, new wires, and I verified the grounds are good and sockets/bulbs are good, as I can feed 12v to each taillight pigtail and get them to work, both tail and bright filaments, and both work, even both at once by jumping both pigtails There is no power coming out of this converter on R or L wires. I jumped the brake switch and see 12v at the input but nothing coming out. Also set T/S switch to each side and have power going in, but nothing coming out. Ok, defective converter? I already took one back to A-zone, got the same unit, same results. So I just got one from NAPA, same Hopkins brand, but this one has the flat 4 wire output plug attached. The AZ ones have no plug, just wires to splice. Weird thing: If I set TS to one side and leave brakes off, then put a test light on that side's TS wire, the rear light does have the bright filament working, Why does it take a bit of resistance to do that? But just trying brakes alone, I can use test light and neither brake filament works What am I doing wrong here?