Today, while doing 80 mph on the highway, I accidentally pressed the Locking Rear Axle button on top. A light went on and I kept pressing it again but the light didn't want to go off. After a while it did by itself. Does anyone out there know if there are any dire consequences to this?
Around the same time I heard a popping sound like a rock hitting my undercarriage and there was a smell like a lighted firecracker. Was this just a coincidence (I hope so) or did some thing happen down there? The car seems to work fine and all gauges measured normal.
I would really appreciate your comments on this.

Today, while doing 80 mph on the highway, I accidentally pressed the Locking Rear Axle button on top. A light went on and I kept pressing it again but the light didn't want to go off. After a while it did by itself. Does anyone out there know if there are any dire consequences to this?
Around the same time I heard a popping sound like a rock hitting my undercarriage and there was a smell like a lighted firecracker. Was this just a coincidence (I hope so) or did some thing happen down there? The car seems to work fine and all gauges measured normal.
I would really appreciate your comments on this.

certain criteria has to be met before the locking diff button does anything and 80mph isn't one of them. truck must be in 4wheel low lock and under 20mph before the diff will lock.probobly just a coincidence with the smells.

the light would not have just "come on." It would have blinked for several seconds and then went back off, indicating that it cannot engage due to the criteria intimidator referred to.

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by xAltitude:
Did you try pushing some of the other buttons or putting the shifter in reverse to clear the light? </div></BLOCKQUOTE>
No, I just pressed the same button a few more times. I wanted to stop the car and turn it off, but I couldn't because of the traffic. by the time i was going to stop, the light turned off by itself. I don't remember if it was blinking or not. It happened so fast! When I heard the popping sound underneath, tha't's when I got concerned. Hope that was just a coincidence.

Thanks for your input, guys. It really took a load off my mind.