Right turn good , left turn all four flashers, press brake and the turn signals go solid on.... Any way to get it back to working normal? Any help appreciated....

 

Some place on the left side you have a bad bulb or socket that is not getting a good ground.

I would clean front and rear sockets and look at the bulbs.

If this has a trailer wiring I have seen problems there as well

 

HAHAHAHAHAHAHAHA oh man i sooooo hate electrical problems...guy in my town with a chevy, everytime he hits his brakes..his tail lights go out and his blinkers go solid on..everything else works fine as it should lmao

 

I would certainly start at the trailer wiring box as previously stated, if equipped.

 

I've seen quite a few trailer converter boxes short and do something weird like this. I'd try removing it from the system (if the truck is so equiped).



Now, If you don't have trailer wiring...

 

looking for the body ground on a 96 t100. its has to be some place simple. I sure. The last time I had a problem like this was with 77. It was on the drive back rear wheel fender. I just can't find it on this t100.