Warning Lights and Diodes (cont).

TM 10-3930-638-24&P

2-28. INSTRUMENT PANEL MAINTENANCE (cont)

e. Warning Lights and Diodes (cont).

REMARKS

ACTION

ITEM

LOCATION

STEP

CLEANING

WARNING

Dry cleaning solvent (P-D-680), used to clean parts is toxic and

flammable. Wear protective goggles and gloves and use only in a

well ventilated area. Avoid contact with skin, eyes, and clothes

and don't breathe vapors. Do not use near open flame or

excessive heat and don't smoke when using it. Failure to do so

could cause serious injury. If you become dizzy while using

cleaning solvent, get fresh air immediately, and get medical

attention. If contact with skin or clothes is made, flush with large

amounts of water. If contact with eyes is made, wash eyes with

water immediately, and obtain medical aid immediately.

Electrical connectors and

Clean

Use cleaning solvent P-D-680 on

connectors and terminals only

terminals (1, 2, 5 and 6)

Lens (3)

Clean

Use clean, dry cloth

INSPECTION

Inspect

Replace if insulation frayed, or if

Harness, connector and

conductors broken

light assembly wires

TESTING

Isolation diode (6)

Test

Set ohmmeter to lowest resistance range,

and connect leads to terminals of diode

(6). Note reading, then reverse leads and

note reading. There should be one low

and one high reading. Replace diode if

readings are both low, both high, or

identical

INSTALLATION

Instrument panel, a. Isolation diode (6)

Push on

Connector (5)

far right side

b. Bulb (4)

Install

In socket (2)

c. Socket (2)

Position

From below instrument panel

d. Lens (3)

Position

On instrument panel top

e. Socket (2) and lens (3)

Push together

While rotating lens 1/4 turn to secure

socket (2)

f. Wire leads (1)

Push on

Warning light terminals

2-138