TM 5-3895-370-14&P
Table 4-4. Unit Troubleshooting Procedures - CONT.
Malfunction
Test or inspection
Corrective action
ELECTRICAL SYSTEM (CONT)
Step 5. Check voltage on resistor/junction cable at terminal strip (clearance/marker 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 6.
Step 6. Check voltage on junction/breaker cable (black 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 7.
Step 7. Check voltage on opposite side of clearance/marker amp breaker.
If 12 +3 vdc is not measured, replace amp breaker (para 4-76).
If 12 +3 vdc is measured, repair or replace chassis wire harness (para 4-88).
25.
IDENTIFICATION AND/OR TAILLIGHTS 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 BR).
If there is no continuity, replace intervehicular cable.
If there is continuity, go to step 2.
Step 2. Check voltage on 12-volt socket/cable (terminal BR) at top of terminal strip (brown wire) in junction box.
If 12 +3 vdc are not measured, replace 12-volt socket/cable (para 4-91).
If 12 ±3 vdc are measured, go to step 6.
4-31
