2006 F250 Lariet crew cab. (asking this for my bother-n-law) Trying to establish a consistant theory but its kinds weird. His driveway is on a slight angle about 10-15 degrees maybe. This is where the weird starts. If he parks his truck up hill no problems truck can sit there for days and start right up. If he backs in (truck facing downhill) the batteries will be dead the next morning. The only other electrical issue he has is sometime the temp. contol display cuts out (dont have heat or ac till it comes back on) Im sure no one has experinced this problem but just thought i would ask for any input. Thanks again