blinker problems

Just picked up an 04 explorer... Radio stays on no matter what. Keys out of the ignition, any door has been opened. No matter what I do it stays on and drains the batt. Any helpful suggestions or wiring diagrams on the switching of the deck would be very helpful. Also the turn signal just gives...

My 2003 Ford Explorer's blinkers work whenever they want, my check engine, brake lights stays on and my A/C sounds like it's beating on a drum but first thing first...How do I fix my blinker? Thanks