Brake lights and turn signals INOP

1029 0
I have a 2012 Ram 1500 My rear turn signals as well as my brake lights won’t work. The 3rd brake light on the cab works fine. I’ve replaced the brake light switch about 3 times now bulbs 4-5 times and the turn signal switch the front turn signals work but blink fast indicating a burnt out bulb or some other issue but I’m stumped at this point I’ve check all the fuses and can’t seem to find on that’s blown any body else encounter this before it’s a head ache and I’m tired of buying parts that don’t fix it check engine light is also on says brake light switch code.