TM 5-2420-230-24-1
Table 3-6. Unit Troubleshooting Table. -- Continued
Malfunction
Test or Inspection
Corrective Action
46.
BRAKE LIGHT DOES NOT WORK.
Step 1.
Ensure master light switch is set correctly (TM 5-2420-230-10).
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical circuits, a
direct short may result. Damage to equipment and injury or death to personnel may occur.
Step 2.
Check circuit breaker CB-23 in the Power Distribution Panel (PDP) (refer to FO-1).
If circuit breaker CB-23 is tripped, reset circuit breaker.
Step 3.
Ensure air system is pressurized to 75-100 psi (517-689 kPa).
Step 4.
Check brake light and bulb (1) to ensure they function correctly.
If brake light and bulb (1) do not function correctly, replace brake light or bulb as required
Step 5.
Check foot treadle valve switch (2) to ensure it functions correctly.
If foot treadle valve switch (2) does not function correctly, replace foot treadle valve (Para 8-9).
Step 6.
Check brake valve for proper function at brake switch port.
Step 7.
Check wiring harness (3) for continuity.
If continuity is not present, replace wiring harness (3) (Para 12-27).
Step 8.
Check master light switch (4) to ensure it functions correctly.
If master light switch (4) does not function correctly, replace master light switch (Para 12-12).
Change 1