I tested all the fuses in the fuse box ,under the dash 6 don't work, their for the headlamps, tranmission range switch, gem module, audio, starter relay. Although the truck seems fine, why won't these fuses read they have power going to them? Also, under the hood ,on the main fuse box, the first 2 fuses (10a and 15a), won't work either,WHAT IS UP????