REVERSE WARNING ALARM DOES NOT WORK (cont) -624880165

TM 5-2420-222-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

28. REVERSE WARNING ALARM 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.

c. If connection at terminal (1 or 2) is corroded, clean using wire brush.

d. If connection at terminal (1) is frayed or broken, repair reverse warning alarm ground wire

assembly (page 2-137).

e. If connection at terminal (2) is frayed or broken repair black wire in warning alarm wiring harness

Step 3. Connect jumper wire between reverse warning alarm sensitive switch terminals (3 and 4). Listen for reverse

warning alarm (5) to sound. Disconnect jumper wire from reverse warning alarm sensitive switch terminals (3

and 4).

a. If alarm (5) does not sound, go to step 4.

b. If alarm (5) sounds, replace reverse warning alarm sensitive switch (page 2-677).

Step 4. Using multimeter set to 30 vdc scale, place red probe on reverse warning alarm sensitive switch terminal (3)

and black probe on reverse valve housing (6). Check for 11 to 13 vdc on multimeter.

a. If multimeter reads 11 to 13 vdc, go to step 5.

b. If multimeter reads less than 11 vdc, repair brown wire in warning alarm wiring harness (page 2-

137).

Step 5. Connect jumper wire between reverse warning alarm sensitive switch terminals (3 and 4). Using multimeter

set to 30 vdc scale, place red probe on reverse warning alarm terminal (2) and black probe on reverse

warning alarm terminal (1). Check for 11 to 13 vdc on multimeter. Disconnect jumper wire from reverse

warning alarm sensitive switch terminals (3 and 4).

2-104