Hello. My truck was working just fine then I go to start it this morning and I get nothing. I have no dash lights, headlights, the radio doesn't work and the windows will not work either. The locks work fine as well as the cab lights and the dinger dings just fine when the key is in the ignition. The battery is only 4 months old and tests at 12 volts. Any idea what the problem could be? I'm very confused and puzzles. Thanks a bunch