TM-9-2350-277-20-1 Unit Maintenance Manual Volume 1 M113A3 M577A3 M1064A3 M1068A3 M58 Download
Page 199 of 858
TM 9-2350-277-20-1 SERVICE HEADLIGHTS DON’T WORK 0031 00 INITIAL SETUP: M a i n t e n a n c e L e v e l Unit T o o l s a n d S p e c i a l T o o l s General Mechanic’s Tool Kit (WP 0926 00, Item 65) Multimeter (WP 0926 00, Item 30) P e r s o n n e l R e q u i r e d Unit Mechanic 63T10 R e f e r e n c e s See your -10 E q u i p m e n t C o n d i t i o n Engine stopped (see your -10) Carrier blocked (see your -10) T 1. Operate lights in all lighting control positions (see your -10). 2. Do any exterior lights operate in any lighting control switch positions? YES NO TN 1. Go to No Exterior Lights Operate (WP 0029 00). Y 1. Turn master light switch to SER DRIVE. 2. Do both high beams and/or both low beams fail to come on? YES NO GO TO AY (PAGE 0031 00-3) 2Y 1. Turn MASTER SWITCH to OFF. 2. Remove two screws (1), washers (2), and dimmer switch (3). 3. Remove harness 12349881 plug (4) from dimmer switch jack (5). 4. Turn MASTER SWITCH to ON. 5. Measure voltage between harness 12349881 plug (4) pin G (6) and ground. 6. Does multimeter read less than 17 volts? YES NO GO TO BY (PAGE 0031 00-4) 0031 00-1