1997 k2500 blinker/brake light issue

[dboots77]

I have a 1997 gmc k2500 ecsb and I'm having issues with my blinkers. When I turn either one of them on the fronts work but both backs blink as well and when I'm on the brakes they just stay lit. I can't figure this out for the life of me. Any suggestions would be greatly appreciated.

Thanks
Oh and I think I posted this in the right spot of not mods please move

 

[98_k1500]

Sounds like your trailer pigtail has the blinkers and brake lights tied together or something along those lines.

 

[dboots77]

I unplugged the trailer pigtail ect. And this just happened one day it didn't use to do this. One day there was a buzzing sound under the dash when the blinkers were on and the brakes pressed.