Getting to know my week old truck. Its seems the electrical has been jerry rigged to work. For example you turn the truck on and on comes the full lighting system. However this one worries me a bit I found this under the drivers seat. It has a 50 amp fuse inside so logic dictates I need it. Spend 20 mins on Google images but could not find it. I am guessing due to the size of the fuse its for the starter or distributor. Can anyone confirm my guess? Thanks

 

looks like a large fuse used in an audio system, for the main power cable to the amps??

 

That would make scene since there is a poor man's sound system in there. thanks