just replaced my heater core, and after putting dash back together i turned truck on and my break light comes on blinking, after that my abs light turns on..

truck wasnt doing that till i removed dash, is it possable to have pinched a wire some where?. I was wondering if theres a wire harness any where around my dash that could have been pluged in incorrectly or somthing.

 

I'm assuming you forgot to plug something in..I know its annoying but you might have to remove the dash again

 

I'd try crawling under the dash before removing it. Most of those connections are behind the steering wheel area.
Good Luck

 

brake switch under dash had to be re adjusted fixed

 

THX for posting the resolution