Hello all,
I am actually getting a new vehicle soon so today I spent some time removing all of my audio equipment out of my 1999 Blazer. All went well and after I got the dash put back together with the stock radio back in, now the automatic headlights are not working! I know for a fact all wire plugs are where they are supposed to be and the sensor is hooked up. What has gone wrong here?

 

Not sure but on my 98 if the parking brake is engaged or even down a few clicks they wont come on. try that

 

You know, that may actually be it. My parking brake is 100% broken so even if it was engaged I would never know it. Usually the red parking brake light comes on if it's engaged though.. I'll check it out. Thanks for the response!