What is the fuse on the main power inlet for? Mine has blown where can I get another one. I live in zimbabwe

A fuse protects your wire circuits because it is the weakest link. It keeps the circuit from over heating and fire. It burns out rapidly and safely before damage occurs. The first thing that you need to do is find out why the fuse blew. If its the main cable from the battery, you may need more than one fuse in order to tell what the problem is. You need to put a new fuse with every thing turned off, then start loading the system by turning things on one at a time. You need to physically look at all the wires under the hood and under the dash before you start turning stuff in and putting the fuse in.