PARKING BRAKE HORN ON LOADER BACKHOES WITH SERIAL NUMBERS 319995 THRU 342573 DOES NOT WORK (cont)

TM 5-2420-222-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 2. tart engine and shift transmission into any gear except neutral (TM 5-2420-222-10). Check to see if parking

brake warning light (3) works. Shut down engine (TM 5-2420-222-10).

a. f light (3) works, go to step 3.

b. f light (3) does not work, go to step 4.

Step 3. sing multimeter set to RX1 scale, place red probe on electric horn brown wire terminal (4) and black probe on

parking brake warning light brown wire terminal (5). Check for 0 ohm on multimeter.

a. If multimeter reads 0 ohm, replace parking brake horn relay (Serial Numbers 319995 thru

342573 only) (page 2-489).

b. If multimeter reads more than 0 ohm, replace parking brake horn-to-relay lead (Serial Numbers

319995 thru 342573 only) (page 2-505).

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