So I bought some LED lights at walmart for like $20, they're small and low profile but pretty bright. Anyways, they came pre-wired and all that. So I mounted them on my tow hitch bar, and the plan was to just tap into the towing plug wire harness thing, and get the power there for the reverse so the LED lights come on when I go into reverse...so without doing much research(seemed pretty straight forward) I went ahead and attempted it yesterday. I took off the plug harness, and lowered it and opened it all up, and on the cover it says Backup Lamp is the center pin, and looking at the back all opened up, the one that went into the center was a yellow and silver striped wire, so i cut it, and soldered the wires to the leds and yellow all together, than electrical taped the shit out of it, sealed basically all of it backup, but decided to try it before I got it all perfectly sealed for good...so I turn the ignition on, put it in reverse(w/ emergency brake on) and the lights dont work, but my stock reverse's are on...so I try it again starting the truck(e brake still on, i was in garage) and they still didnt work...so i took some wire and connected it to all the pins in the towing plug and the only one that lit it up when truck was in reverse was the battery positive one..obviously...so idk what to do...did I do something wrong?? can I not tie into the tow plug or what? Any help is appreciated..I can get pics too I guess
EDIT: Could it somehow not work cuz the e-brake is engaged? I know my DRL's don't come on until you disengage the e-brake..idk that's just a thought.
Oh and I also have the Fog anytime mod where you add a wire to tow tail relay(so atleast park lights have to be on for fogs to come on)...could that be interfering somehow?