Operation CHARM: Car repair manuals for everyone.

Fuse Tester

A simple tester that indicates a blown fuse is available (J 34764 or equivalent). To check a fuse, the tester is applied directly to the fuse in the fuse block. Two probes contact the fuse. The probes are either placed into the slots of a flat fuse or to the metal ends of a glass fuse. With power "ON", a red LED in the tester lights if the fuse is open. The handle of the tester is a tool for removing either type of fuse.