DASH LIGHTS AND GAGE LIGHTS INOPERATIVE (Cont)

TM 9-2320-285-24-1

2-19.

INSTRUMENT PANEL TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

9. DASH LIGHTS AND GAGE LIGHTS INOPERATIVE (Cont)

Step 2.

Check for continuity of inoperative dash and gage light bulbs.

a. If bulbs are defective, replace (para 2-26d(l) or 2-26d(2)).

b. If bulbs are not defective, repair sockets and wiring as necessary (para 2-26d(1) or 2-26d(2)).

Step 3.

Pull out headlight switch to first detent position and rotate switch clockwise.

Use a voltmeter to check for 12 Vdc at both sides of 4A dash light fuse (para 2-35g).

a. If voltmeter indicates 12 Vdc at both sides of 4A fuse, repair or replace wiring between 4A fuse

and dash and gage lights (para 2-35c(1), 2-35c(2), or 2-35c(3)).

b. If voltmeter indicates 12 Vdc at only one side of 4A fuse, replace fuse (para 2-35g).

c. If voltmeter does not indicate 12 Vdc at either side of 4A fuse, go to step 4 below.

Step 4.

Pull out headlight switch to first detent position and rotate clockwise.

Use a voltmeter to check for 12 Vdc at headlight switch terminal blue/red electrical lead.

a. If voltmeter indicates 12 Vdc, repair or replace wiring between headlight switch and 4A fuse

b. If voltmeter indicates zero, go to step 5 below.

Step 5.

Use voltmeter to check for 12 Vdc at both terminals of headlight switch 30 ampere circuit breaker.

a. If voltmeter indicates 12 Vdc at both terminals, replace headlight switch (para 2-26a(4)).

b. If voltmeter indicates 12 Vdc only at battery side of 30 ampere circuit breaker, replace 30 ampere

circuit breaker (para 2-26a(4)).

c. If voltmeter indicates zero at both terminals of 30 ampere circuit breaker, repair or replace wiring

from 30 ampere circuit breaker to ammeter and batteries.

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