TM 9-2320-260-20
Table 2-4. Electrical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
AUXILIARY POWER SYSTEMS
AUXILIARY POWER RECEPTACLE FAILS TO OPERATE (M816, M819, AND M821)
Test 1. Test battery and ignition switch for power output.
Step 1. Turn battery switch to ON position.
Step 2. Turn ignition switch to RUN position.
Step 3. Push horn button. Horn should sound.
a. If horn sounds, go to test 2.
b. If horn fails to sound, go to malfunction 35.
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