INSTRUMENT PANEL DASH LIGHT DOES NOT WORK

TM 5-2420-222-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

15. INSTRUMENT PANEL DASH LIGHT 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.

Check dash light (1) to see that it is tightly mounted.

If dash light (1) is tight, go to step 2.

If dash light (1) is loose, tighten nut (2) using 9/16inch open-end wrench.

Step 2.

Pull cap (3) off of dash light (1). Push bulb (4) in, turn 1/4turn counterclockwise, and take out of dash

light (1). Turn on service drive front and combination taillights (TM 5242022210). Using multimeter

set to 30 vdc scale, place red probe on light positive terminal (5) and black probe on cowl support (6).

Check for 11 to 13 vdc. Turn off service drive front and combination taillights (TM 5-2420-222-10).

If multimeter reads 11 to 13 vdc, place new bulb (4) into dash light (1), push down, and

turn 1/4turn clockwise. Push cap (3) onto dash light (1).

If multimeter does not read 11 to 13 vdc, replace dash light (page 2-554).

16. ONE WARNING LIGHT 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.

Check to see that warning light (7) is tightly mounted.

If warning light (7) is tightly mounted, go to step 2.

If warning light (7) is loose, tighten nut (8) using 9116-inch open-end wrench.

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