TM  10-3930-643-34 GENERAL  MAINTENANCE  PROCEDURES. 2-13. Electrical Repair. (b) TS-352 B/U. 1 Set RANGE switch (1) on RX1. 2 Put black (-) lead (2) into the OHMS -DC ± AC jack. 3 Put red (+) lead (3) in the upper left OHMS jack. 4 Turn FUNCTION switch (4) to OHMS. 5 Touch the two probes (5) together. 6 Zero meter by turning the OHMS ZERO ADJ (6) knob until needle (7) is over O on top scale. If needle will not zero, replace batteries. If needle still will not zero after replacing the batteries, turn in the multimeter  for  repair. (2) Testing for continuity. Continuity tests check for breaks in a circuit, such as the switch, light bulb, or electrical cable, as shown. To make a continuity check, do the following steps: (a) Set up and zero the multimeter. Do not touch terminal caps with probes. This  will  give  false reading. Failure to do the following step can damage the multimeter. (b) Disconnect the circuit being tested from the power source. To be safe, disconnect the battery ground strap. (c) Connect the meter probes to both terminals of the circuit being tested. (d) Observe needle movement. If the needle swings to the far right over the 0 on the top scale, the circuit has continuity. If the needle doesn’t move, the circuit is open (broken). If the needle jumps or flickers, there is a loose connection in the circuit being tested. (3) Testing for short circuit. A short circuit occurs when two circuits that should not be connected, have contact with each other. A  short  also occurs when a circuit that should not touch ground, has contact with ground. To check for shorts,   do the following steps: 2-11