i start the truck, the lights come on, even with the switch off. it never did that before and would like to find out the reason why. just wondering if this happened to anyone else? its gotta be either the switch or the fuse or a wire grounding out right? im lost please help lol

 

DRL (daytime running lights) maybe? Or do the tail lights turn on as well?

 

headlights, and taillights. Im stumped. i guess it wont hurt since they turn off when i shut off the key?

 

Something covering the sensor in the pass speaker grill on the dash?

 

Information on your truck??

 

I had the same problem a few years ago, turned out to be a faulty sensor for the automatic headlights.

 

1998 blazer, base package. ill check tomorrow if i have a sensor in the speaker, never noticed before. thanks for all the quick help!