Keeping truck charged

Did you check your lock cylinder? I had a similar problem with mine. Turned out it was that my cylinder had broken and was letting me take my key out without having to push the button behind the steering wheel to put the key into lock. If the key does not go into lock the radio and everything will stay on. Could be running your battery down that way.

remove batt neg cable, and bridge it with a test light , if the light is bright you have a draw, pull each fust individually to locate live circuit