TM 9-2330-203-14&P
Table 4-2. Organizational Troubleshooting (Con't).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4.
Disconnect chassis wiring harness from intervehicular cable. While assistant operates lights,
check voltage at intervehicular cable.
If 24 volts are present at the intervehicular cable, repair or replace chassis wiring harness
(para 4-15 or 4-14).
Step 5.
Disconnect intervehicular cable from towing vehicle receptacle. While assistant operates lights,
check voltage at towing vehicle receptacle.
If voltage is present at towing vehicle receptacle, replace intervehicular cable (para 4-13).
If voltage is not present at towing vehicle receptacle, troubleshoot towing vehicle electrical
system. Refer to towing vehicle technical manual.
BRAKES
4. BRAKES WILL NOT RELEASE.
Step 1.
Check brake adjustment.
Adjust brakes (para 4-18).
Step 2.
Check for weak or broken brakeshoe return spring(s) (para 4-19, 4-20, or 4-21).
Replace spring(s).
Step 3.
Check for separation of brakeshoes and linings (para 4-19, 4-20, or 4-21).
Replace brakeshoes.
5. NO BRAKES OR WEAK BRAKES.
Step 1. Check brake adjustment.
Adjust brakes (para 4-18).
Step 2. Perform brake system air leakage test (para 4-31).
Tighten or replace any leaking components.
Step 3. Check for dirty or damaged air filter (Ml 97A1 and M198A1) (para 4-27).
Clean or replace if required.
Step 4. Check fluid level in master cylinder (M197A1 and M198A1) (Chapter 3, Section I).
Replenish fluid if required.
Step 5. Check for air in hydraulic brake system (M197A1 and M198A1).
Bleed brakes (para 4-24).
4-9
