My 96 blazer started having a weird electrical issue. I was driving and the interior lights came on. Now my interior lights are stuck on (I pulled the fuse), windows wont work, and the radio display works but there is no sound. I checked all the normal fuzes. I tore my door apart and checked it with a test light. The light did not come on like it had no power, but when I checked in reverse. I hooked the light up to the positive post on my batterie. I had ground to both posts for my speaker and 3 on my window. Please someone help me. Thank you for your time.

 

It sounds like you have multiple problems.

The interior light issue is probably caused by a faulty or improperly installed door switch.

If you have no power to the window switches, then you have to start tracing back the wiring to see where you have power. The windows are powered by the PWR WDO 30A circuit breaker through the yellow wire. This wire should be hot (+12V) with the key in the RUN position.

As far as the radio working, but not putting out any sound... Not sure.