SERVICE BRAKES DO NOT WORK WHEN TRUCK IS BEING TOWED CONTINUED

TM9-2320-270-20-1

TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 5.

Go to EMERGENCY hookup hose (4) color coded red. Check hose and two

gladhands (5) for damage, clogs, or leaks by listening for hissing or

using soap solution and watching for bubbles (page 4-1).

If EMERGENCY hookup hose or gladhands are damaged, clogged,

or leaking, clean, replace, or repair (page 4-838).

Step 6.

Go to towing vehicle and check service gladhand (6) and hose (7) to

tractor protection valve (8) for clogs, damage, or leaks by listening

for hissing or using soap solution and watching for bubbles (page 4-1).

a. If gladhand or hose are clogged, damaged, or leaking, repair,

replace, or clean (page 4-609).

b. If gladhand and hose are not clogged, damaged or leaking, go to

SERVICE BRAKES DO NOT RESPOND WHEN APPLIED BY TRAILER

HANDBRAKE CONTROL (page 3-157).

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