ONE COMBINATION TAIL AND FLOODLIGHT FLOODLIGHT DOES NOT WORK

TM 5-2420-222-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

7. ONE COMBINATION TAIL AND FLOODLIGHT FLOODLIGHT 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.

Step 1.

Pull blue wire terminal (1) out of connector (2). Using multimeter set to RX1 scale, place red probe on

blue wire terminal (1) and black probe on taillight (3). Check for 0 ohm on multimeter.

If multimeter reads 0 ohm, repair blue wire in rear light wiring harness (page 2-137). Plug

terminal (1) into connector (2).

If multimeter reads more than 0 ohm, go to step 2.

Step 2.

Disassemble combination tail and floodlight (page 2638). Using multimeter set to RX1 scale, place

red probe on positive unit terminal (4) and black probe on unit ground terminal (5). Check for 0 ohm

on multimeter.

If multimeter reads 0 ohm, go to step 3.

If multimeter reads more than 0 ohm, replace sealed unit and assemble combination tail

and floodlight (page 2638). Plug terminal (1) into connector (2).

Step 3.

Check floodlight positive lead (6) and ground lead (7) for cracked, corroded, or broken connections.

Check for loose ground terminal (8).

If positive lead (6) or ground lead (7) is cracked or broken, replace it (page 2137) and

assemble combination tail and floodlight (page 2-638). Plug terminal (1) into connector

(2).

If positive lead (6) or ground lead (7) is corroded, clean using fine abrasive paper (item 20,

Appendix C). Assemble combination tail and floodlight (page 2638). Plug terminal (1) into

connector (2).

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