TM 10-4610-239-10
TM 08580B-10/1
Table 3-1. (Army) Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
b. Tighten lamps found loose in their sockets.
c. If trouble is still present, refer to unit maintenance.
4.
WRONG LIGHT GOES ON.
Step 1.
Will require a check of the cable assembly coding and voltages.
Notify unit maintenance.
AIR BRAKE SYSTEM (TRAILER)
1.
SYSTEM INOPERATIVE.
Step 1. Inspect air line hookup to be sure lines are not crossed.
Disconnect air lines and reconnect correctly.
Step 2. Listen for escaping air, and locate defective line or fixture.
Notify unit maintenance.
Step 3. Check the air system of the towing vehicle for leaks or lack of pressure.
Notify unit maintenance.
2.
BRAKES REMAIN LOCKED.
Step 1. Check for cause of the lack of air pressure.
Notify unit maintenance.
Step 2. Check the operation of the emergency/relay valve.
Notify unit maintenance.
Step 3. Check to see if the compression springs have locked the brakes (wheels will not turn if springs have locked).
Locate and correct the cause of the loss of air pressure; then refer to figure 2-82 in this manual for
instructions for resetting a locked spring brake.
3-3
