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Page Title: PARKING BRAKE HORN ON LOADER BACKHOES WITH SERIAL NUMBERS 319995 THRU 342573 DOES NOT WORK (cont)
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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).
2-97

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