Table 5. Electrical System Troubleshooting Procedures - continued

TM 9-2320-391-10

ELECTRICAL SYSTEM TROUBLESHOOTING - Continued 0069 00

ELECTRICAL SYSTEM Continued

Table 5. Electrical System Troubleshooting Procedures Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

138. AIR DRYER

2. Allow engine to idle until 120

HEATER DOES

psi is registered on FRONT

NOT OPERATE -

BRAKE AIR and REAR BRAKE

Continued

AIR pressure gages.

3. Shut down engine (WP 0016

4. If FRONT BRAKE AIR or REAR

BRAKE AIR pressure gage

does not register 120 psi,

Malfunction 1, Air System

Loses Pressure During

Operation/Slow Air Pressure

Buildup).

3. Check to see if air

If air hoses and fittings are

hoses and fittings are

not free from leaks, notify

free from leaks.

Field Maintenance to repair

leaks.

4. Check to see if air

If air dryer heater does not

dryer heater

operate, notify Field

operates.

Maintenance.

0069 00-139