95 Suburban tail light (not a bulb problem)

[warwick572]

hi there, so i'll try to give as much detail as possible...i had a problem where my left tail light was more dim than the right side and brake light didn't come on, on the left side also and the left turn signal flashed fast, i thought it was the bulbs and since i have darker tail light covers i decided to go with LED. i installed them and that corrected the dim light and brake light comes on now..i have Hyperblinking because i need resistors, but i'll get to that soon, but now that my tail lights work, when i put it in reverse and hit my brakes, the left reverse light goes out, and comes back on when i let off the brakes. another thing i noticed was this only happens when i turn the light switch to DRL lamps or turn lights on. i suspect the circuit is bad, but could be the switch, any suggestions? and im positive its not a bulb. thanks

[777stickman]

The circuit boards in the tail light housing are a know problem. Replacing the unit would be a place to start, not very expensive @ NAPA or O'Rielly's.