1995 Blazer 4wd

My 4wd is switching but I do not have any indicator lights, are they built into the buttons?

 

I don't think so, but I'm not sure how you would change out the bulbs though.

 

mine did that the little plastic clip broke on mine and the wire didn't stay in the whole way, my 4x4 system still worked it just bugged the crap out of me when I couldn't tell if i was in 4wd or not. I went to the junk yard and got a new one works good now