Is it safe to say the ground on the rear lights is the metal brace inside the light. I just installed the ruged ridge light protectors and now there not working just right. if i have the lights on and turn right the right signal blinks but so does the reverse lights on both sides. But by its self it works fine. so i'm thinking its the ground. or could it be something else?

99 wrangler sport, auto. 2.5 inch lift, 31 MTR's