Hey guys. This is my first new thread ever so you'll have to cut me some slack. I'll try to be as detailed in my description of the problem as possible, but I'm not even entirely sure what's going on in the first place. Okay, let's run through this. Walk out to truck. Unlock truck. Get in truck. Truck is off. Start truck. Truck is in Park. Parking Brake is on. All exterior lights are off. Instrument cluster lights are OFF. Release parking brake. Fog and Running lights come on. The 'Exterior Lights' knob on the left hand side of the steering wheel on the consol has not been moved from the 'off' position. Put parking brake back on. Fog and Running lights shut off. Turn 'Exterior Lights' knob to 'Fog Lights On' setting. Fog lights come on. Turn 'Exterior Lights' knob to 'Running Lights On' setting. Running lights come on. Turn 'Exterior Lights' knob to 'off'. All lights turn off. Release parking brake. All lights come on. Flip 'Exterior Lights' knob back and forth between all settings. All lights remain on. Put truck in Drive. Flip 'Exterior Lights' knob back and forth between all settings. All lights remain on. - Now, from this information, can anybody figure out what my problem is? I'm assuming it almost has to be wiring. My lights switch doesn't work unless the truck is in park and the parking brake is on. I have also tried very lightly applying the parking brake while the truck is in drive, just so that the parking brake sensor comes on, and then trying my light switch. The switch still remains inoperative. On a side note, yesterday I replaced my cigarette lighter 15A fuse which had burnt out. Shortly afterwards I was driving down the highway and my gauge cluster lights turned off. My 'exterior lights' knob was turned all the way off, which is how I normally leave it because it doesn't work anyways. As I understand it, the gauge cluster lights are supposed to come on when you turn the switch to the 'Fog Lights on' position. So, I turned the switch to this position. My gauge cluster lights came back on. Although it was day time and I couldn't tell, I would assume my fog lights came on as well. I switched back and forth between 'off' and 'fog lights on' and the gauge cluster light went on and off like it should when working properly. Things stayed in working order for the duration of my trip. Got in the truck again today and my old problem had resurfaced. I hope that wasn't too confusing for you guys, and I also hope you have some idea how I can fix my problem. Have at 'er.