I'm new to the form and I've had my blazer for a few years now and it just rolled 100K and everything is stating to fall apart. The newest problem i'm having is the turn signals keep clicking even after i make a turn and and the flasher are off. It stops when i hit the breaks but then starts up again. I have a 1999 4x4 4 door blazer and was wonder if any one had any suggestion on what i would have to do to fix the problem. I've tried just replacing the combined flasher box behind the glove box but it still does it. I've been doing some reading on there, does this have something to do with the hazard signal or hazard wiring? Can anyone point me in the direction on how to to fix this my self or what need to get fix?

 

It is definitely a problem with the multifunction switch, specifically the hazard switch portion of it. Check out the tech articles linked to below. The first one is a user submitted DIY. 2nd is the factory method of the 1st. The 3rd is the factory replacement method for the entire multifunction switch if the replacement of the hazard switch didn't work.

Broken Hazard Switch Repair
98+ Hazard Switch Replacement
98+ Multifunction Switch Replacement