ELECTRIC HORN DOES NOT WORK (cont)

TM 5-2420-222-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 2. Turn ignition lock switch (6) counterclockwise to accessory. While assistant presses horn switch (7) for a few

seconds, using multimeter set to 30 vdc scale, place red probe on horn terminal (8) and black probe on

bracket (4). Check for 11 to 13 vdc on multimeter. Turn ignition lock switch (6) clockwise to off.

a. If multimeter reads 11 to 13 vdc, replace electric horn (page 2-668).

b. If multimeter reads less than 11 vdc, go to step 3.

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