IDEAL Testing for Continuity – no switching required
Place tester across terminals (live or dead) of components or circuit to be tested. The continuity LED (same as " + DC" LED) will come “On” when resistance between prods is 500K ohms or less. Full brightness of the continuity LED occurs when the resistance between prods is 300K ohms or less. Reversing prods will verify continuity versus low volt DC.
Locating Blown Fuses (single phase, three phase and DC).
Turn Power Off. Place tester across the suspected fuse to perform continuity check. If continuity LED comes "On," the fuse is good. If the continuity LED does not come “On,” the fuse is defective.
For locating a blown fuse with the power on, place tester across the "source" side of one fuse and the load side of an adjoining fuse. If no voltage is indicated, the fuse next to the load side prod is blown. If voltage is indicated, the fuse next to the load side prod is OK. Repeat the same test with the prods on the opposite side of the same two fuses to check the other fuse.