TM-9-2320-260-20

TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)

TECHNICAL MANUAL; UNIT MAINTENANCE

APRIL 1995

TM-9-2320-260-20 - Page 253 of 1337

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

(para. 4-29).

END OF TESTING!

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