TM 9-2320-260-20
Table 2-4. Electrical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test 4. Test horn switch continuity.
Step 1. Disconnect lead 25 from air horn solenoid to protect multimeter.
Step 2. Reinstall horn switch cap (para. 4-29).
Step 3. Set multimeter to RX1 scale.
Step 4. Touch negative lead of multimeter to frame ground.
Step 5. Touch positive lead of multimeter to lead 25 and press down until contact touches base
plate.
a. If continuity is present, connect lead 25 and check horn operation.
b. Remove horn switch and clean or replace horn switch if continuity is not present
END OF TESTING!
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