Electrical issue

[raytort88]

I have a 2007 classic GMC sierra 2500hd 6.6 crew cab. I replaced all the lights with led bulbs, I switched out the relay with one specifically for led turn signal bulbs. I then bought aftermarket led tail lights, this is where things get weird. They work perfectly fine when its light out. Both turn signals work properly no problems, but then as soon as the head lights or even fog lights are turned on wether its with the switch our automatically they go all weird. There is a top and bottom cluster is the breaks, the bottom is the turn. The break portion works fine. now at night the whole thing is suppose to light up well on the driver side the whole thing lights up, the passenger side the break light portion lights up but the turn signal doesn't, now when i put the turn signal on the passenger side will flash like normal but the driver side will pulse (as if the 4 ways were turned on kinda.) I have switched the lights just to see if it did the same thing (if it was the lights or the truck) and the passenger side did the same thing, which tells me its something with the truck. I have been searching for quite a while now and all I could find is that it could be the replay. So i reinstalled the stock relay and figured id just deal with the hyper flash but it still did the same thing. I have brought it to a mennonite garage that always works on my vehicle, they are certified electricians and they spent 6 hrs trying to figure it out and they couldn't find anything wrong. So I'm hoping someone on here will have an idea.

 

yes this is my first post ever. I have been reading these forums for years though. if this is posted in the wrong spot I am sorry not quite sure how to do anything on here yet.

[raytort88]

no help?