TM 5-3895-370-14&P
Table 4-4. Unit Troubleshooting Procedures - CONT.
Malfunction
Test or inspection
Corrective action
ELECTRICAL SYSTEM (CONT)
21. TURN SIGNAL LIGHT DOES NOT OPERATE (CONT).
Step 8. Check voltage on resistor/junction cable at terminal strip (left hand turn signal terminal) in junction box.
If 12 ±3 vdc is not measured, repair or replace resistor/junction cable (para 4-74 and 4-75).
If 12 ±3 vdc is measured, go to step 9.
Step 9. Check voltage on junction/breaker cable (yellow wire) on left side of circuit breaker box.
If 12 ±3 vdc is not measured, repair or replace junction/breaker cable (para 4-75 and 4-76).
If 12 +3 vdc is measured, go to step 10.
Step 10. Check voltage on opposite side of turn signal amp breaker.
If 12 +3 vdc is not measured, replace amp breaker (para 4-76).
If 12 +3 vdc is measured, go to step 11.
Step 11. Disconnect wire from turn signal/taillight and check for voltage from chassis wire harness (yellow wire).
If 12 +3 vdc is not measured, repair or replace yellow wire in chassis wire harness (para 4-88).
If 12 ±3 vdc is measured, replace turn signal and taillight socket assembly (para 4-79).
22. STOPLIGHTS DO NOT OPERATE.
NOTE
Start at step 1 for 12-volt system or step 3 for 24-volt system.
Step 1. Check continuity across intervehicular cable (at terminals R).
If there is no continuity, replace intervehicular cable.
If there is continuity, go to step 2.
4-28
