TM 10-3930-664-24 Table 2-4.  Voltage Reading Switch Setting Scale 1 VDC Reading divided by 10 10 VDC Actual scale reading 100 VDC Reading x 10 1000 VDC Reading x 100 E. MEASURING AC VOLTAGE 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. SET   MULTIMETER   SELECTOR   SWITCH   TO 1000 VOLTS AC RANGE. 3. CONNECT MULTIMETER PROBES TO CIRCUIT BEING MEASURED. a. Connect  red  probe  to  positive  (+)  side  of circuit to be tested. b. Connect black probe to negative (-) side. 4. READ    THE    AC    SCALE    ON    METER    AND DETERMINE VOLTAGE. FOLLOW-ON MAINTENANCE: Repair wiring harness (para.  2-83) END OF TASK 2-236