TM 9-2320-269-10
TROUBLESHOOTING TABLE - CONTINUED
AIR BRAKES - TRAILER - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Service brakes will not release - truck and trailer towing - Continued.
Step 2.
Check to make sure Trailer handbrake control (1) is in the "OFF" position and the Trailer emergency
control (2) is pushed in, to the dash panel.
a.
Move Trailer handbrake control (1) to "OFF" position.
b.
Push Trailer emergency control (2) to "IN" position.
Step 3.
Check for possible air leaks at air reservoirs, hoses and fittings at intervehicle air hose connections.
Notify organizational maintenance of any leaks or damaged lines. Otherwise trailer brakes will
not release.
TA 222689
3-26