So my Push Button 4 wheel drive wont engage. The light on the dash wont light up and it doesnt shift into 4x4. Anyone know where to start?
I would like to check the simple stuff first. O and my heat only gets hot when im giving the vehicle gas. Any ideas? This is all on a 2003 Ford Explorer. Thanks for any advice!

 

Hi, It has a relay into board of control main that produces a fault . You must replace it. My english it not so good

 

must you disassemble the part from front