Hey guys, this is the first time i’m using this forum. It has helped me a lot in the past, but I do notice that a lot of the threads are older, so I hope there are still some members out there. I recently bought a high mount third brake light LED Strip. It has brake light, running light, turn signals, and hazards. I’ll submit photos of the item below. The issue i’m running into is, in order to gain control of these features, you must tap into the tail light wiring. I have located the wiring (pictures below), and determined what each wire does. The issue is, if you look at the instructions the website provided me, I need to plug the black cable to the negative terminal and the red cable to the positive terminal, and then the rest of the cables to their respective functions. however, I can’t determine which is the positive terminal to plug the red cable into. Therefore, I can twist the red cable up with whichever function I want to work, but I can’t get more than just one function at a time to work, or in other words, I can’t get them to all coexist. I can only just get one to work at a time. The reason for this is because the red cable is feeding off of the positive signal coming from whichever cable I have it twisted with, and not it’s own signal. Anyone have any Ideas?

Black cable is ground, brown cable is turn signals, blue cable is running lights, purple cable is reverse lights, orange cable is brake lights.

Instructions from the product.

 

So as I see the instructions. You connect Black to a good Ground. Red is a switch Accessory Voltage that powers the system. So now you find the positive lead for Left, Right, Brake, etc and connect those (not the grounds) Should be straightforward just don't use one of the lamps for your VCC+..run to a fuse don't try to grab power from an existing lamp or signal.. Now to find the positive, just grab a multimeter and have someone step on the brake/turn signal/etc and find the positive line and connect it to the appropriate yellow, or other color.

 

So before you answered this, I ended up using the pos terminal on the battery for the red wire. It ended up working, but i’d prefer if i didn’t have to run leads off the battery. Now I just have to find a positive terminal preferable in the trunk that is always on when the car is on, but is off when the car is off. Thanks for your help. If you guys want i’ll post a few pics of the strip when it’s done.

 

Please do provide the pictures when done. We always enjoy seeing what others have done!