TM 10-3930-664-24 2. DISCONNECT CIRCUIT TO BE TESTED FROM POWER SOURCE. 3. CONNECT  MULTIMETER  PROBES  TO  BOTH TERMINALS    OF    CIRCUIT    BEING    TESTED. OBSERVE METER NEEDLE MOVEMENT. a. If needle swings to far right (over "0" at top of scale), circuit being tested has continuity. b. If needle does not move, circuit is open. c. If needle jumps or flickers, there is a loose connection in circuit being tested. B. SHORT CIRCUIT TESTING 1. SET UP AND ZERO MULTIMETER. a. Before using multimeter, check mechanical zero of meter.  If meter pointer is  not  exactly  over  zero  line,  reset  pointer by rotating adjusting screw. 2. DISCONNECT CIRCUIT TO BE TESTED FROM POWER SOURCE. 3. CONNECT MULTIMETER PROBES TO CIRCUITS BEING TESTED. a. Connect   one   meter   probe   to   first   circuit (see A in figure). b. Connect    other    meter    probe    to    second circuit (see B). 4. OBSERVE METER NEEDLE MOVEMENT. a. If needle swings to far right (over "0" at top of scale), circuits being tested are shorted. b. If  needle  does  not  move,  circuits  are  not shorted. c. If   needle   jumps   or   flickers   circuits   are intermittently short circuited. 2-233