HORN DOES NOT OPERATE

TM 9-2320-260-20

Table 2-4. Electrical Troubleshooting (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

35. HORN DOES NOT OPERATE

NOTE

Electrical troubleshooting of the electric horn and air horn is

the same.

Test 1. Test input voltage to horn circuit breaker.

Step 1. Turn battery switch to ON position and ignition switch to RUN position.

Step 2. Remove lead 25 from horn circuit breaker.

Step 3. Set multimeter to a voltage range that will measure 24 volts.

Step 4. Touch negative lead of multimeter to frame ground.

Step 5. Touch positive lead of multimeter to horn circuit breaker contact.

a. Replace horn circuit breaker if voltage is not present (para. 4-20).

b. If voltage is present, go to test 2.

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