TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks

TM 9-2320-361-24-1 0013 00 0013 00-12 LIGHTING AND WIPER SYSTEM TROUBLESHOOTING (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. DIRECTIONAL SIGNAL INOPERATIVE NOTE Testing procedures for left and right turn signal leads 461 and 460 are performed the same, using tests 2 through 8. This test covers left side 461 turn signal circuit. Test 1. Test turn signal lamps. 1. Turn main switch to SERVICE DRIVE. 2. Place turn signal in left or right position. Turn signal should flash on each side. 1. If turn signal on left or right operates properly, go to test 2. 2. If turn signal on left or right illuminates but does not flash, go to test 3. R.H. FRONT COMPOSITE LIGHT TURN L.H. FRONT COMPOSITE LIGHT TURN R.H. REAR COMPOSITE LIGHT L.H. REAR COMPOSITE LIGHT 15 (+24 VDC) 21 TAILLIGHTS 16 HEADLIGHTS 22-460 22-461 461 460 467A 467B 460-461 LIGHT SWITCH SERVICE DRIVE STOP LIGHT OFF LEFT NEUTRAL RIGHT HAZARD TURN INDICATOR LAMP 75 STOPLIGHT (OPEN) 75 STOPLIGHT 460 R.H. TURN 461 L.H. TURN D E C B A H F G F H M J A K C STOP G C FLASHER 90— STOP/ TURN STOP/ TURN 22 HARNESS CONNECTOR Table 3. Directional Signal Systems Troubleshooting Procedures. TURN SIGNAL SWITCH 491 460-461 20-483-484 X X ~ X ~ ~ ~ ~ ~ 491 460-461 20-483-484 X X ~ X ~ X X ~ ~ ~ 21 22-460- 461 24 23 21 22-460-461 24 23 X X ~ X ~ X X A B C