30A. ENGINE COMPARTMENT. Fuse. A electrical safety device that removes electrical current from an electrical circuit when the current in the electrical circuit is too high. Fuse Kit. and Amplifier; relay box. Multi - Purpose. Included with: Computer Order by quantity and Amperage, Cover, Engine room wire harness, Fuse & relay box, Fuse & relay box upper Cover, Fuse and relay box, Fuse box upper Cover, Fuse holder, Junction block, Junction block Order by quantity and Amperage, Junction block Order by quantity & description, Junction box, Main Fuse box, Main relay block, Upper Cover.