CIGAR LIGHTER DOES NOT WORK

TM 5-2420-222-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

26. ELECTRIC HORN DOES NOT WORK - CONTINUED

WARNING

Although ignition lock switch must be on and battery ground cable connected to test electrical circuit

voltage, turn off ignition lock switch and disconnect battery ground cable before doing resistance tests or

replacing parts. This will keep you from getting shocked and prevent damage to parts and equipment.

Step 3. Turn ignition lock switch (1) counterclockwise to accessory. Using multimeter set to 30 vdc scale, place red

probe on horn switch terminal (2) and black probe on cowl support (3). Check for 11 to 13 vdc on multimeter.

Turn ignition lock switch (1) clockwise to off.

a. If multimeter reads 11 to 13 vdc, go to step 4.

b. If multimeter reads less than 11 vdc, repair purple wire in main and front light wiring harness

Step 4. Turn ignition lock switch (1) counterclockwise to accessory. While assistant presses horn switch (4) for a few

seconds, using multimeter set to 30 vdc scale, place red probe on horn switch terminal (5) and black probe on

cowl support (3). Check for 11 to 13 vdc on multimeter. Turn ignition lock switch (1) clockwise to off.

a. If multimeter reads 11 to 13 vdc, replace horn switch (page 2-672).

b. If multimeter reads less than 11 vdc on loader backhoes with Serial Numbers 235786 thru

235999, repair black wire in horn wiring harness (page 2-137).

c. If multimeter reads less than 11 vdc on loader backhoes with Serial Numbers 319995 thru

342573, repair brown wire In main and front lights wiring harness (page 2-137).

27. CIGAR LIGHTER DOES NOT WORK

WARNING

Although ignition lock switch must be on and battery ground cable connected to test electrical circuit

voltage, turn off ignition lock switch and disconnect battery ground cable before doing resistance tests or

replacing parts. This will keep you from getting shocked and prevent damage to parts and equipment.

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