Bought the truck a year ago from the original owner who kept great maintenance. Today I drove it around locally with the A/C initially on Max A/C then switched to " normal" A/C. Sat in the truck at an idle with A/C on for about 20 mins. When I got home and killed engine/removed the key, it sounded like a fan was running. Figured it had something to do with the A/C " cooling down". Went out many hours later and realized fan was still running. Couldn't find power supply/fuse to kill the fan. First I noticed power locks wouldn't work, then lights wouldn't work. Eventually battery went dead. I'm not even remotely mechanically inclined but don't feel this is a fix that is as complex as brain surgery. Someone please help.
Could be a relay sticking or one of those kind of hook-up to the fan that turns off when a temperature switch cools down and breaks the circuit open wired hot at all times and yours is not doing it.
In today's auto technology sometimes it requires more than a brain surgeon/rocket scientist to pin point the actual defective component/s within the electrical/electronics in auto. For me I thought I was certified/licensed electrician but still learning due to rapid changes in auto technology.
That's why we equal up in pay with doctors when repairing vehicles its tough and having all those sophisticated high dollars special testing equipment and get recertifed every 5yrs to qualify to get the job done.
I fully recommend you bring her in-its not a DIY thing unless you possess the art of Mr. Ohms Law.