Here I show you a quick and easy way to test the mega fuse.
Most of the time, the fuse will blow after incorrectly jump starting the truck, however there have been cases of this happening when a wrench slips when disconnecting or reconnecting the battery.
Symptoms include no radio, door locks, park lights, hvac, and most interior electronics don't work. Note: even with a blown megafuse, the engine will run and the headlights will work.
