ELECTRICAL TROUBLESHOOTING - continued - TM-9-2320-386-24-1-10100

TM 9-2320-386-24-1-1

0012 00

Electrical Troubleshooting (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 1. Disconnect lead 36 from oil pressure gauge (warm engine).

Step 2. Set multimeter to measure continuity.

Step 3. Touch positive lead of multimeter to one end of lead 36 and negative lead of multimeter

to other end of lead 36.

a. If continuity is not found, replace or repair lead 36 (WP 0125 00).

b. If continuity is found, replace oil pressure gauge (WP 0094 00).

END OF TESTING!

19. BATTERY GAUGE INOPERATIVE

NOTE

If STE/ICE-R is available, perform NG31 Gauge Test

Test 1. Test battery gauge.

Step 1. Turn accessory/battery switch to ON position. Do not start engine.

Step 2. Battery gauge indicator should rest between lower edge of GREEN area and upper edge

of YELLOW area on gauge (24 volts).

Step 3. Start engine (TM 9-2320-386-10) and observe battery gauge on instrument cluster.

Step 4. Battery gauge should rise as engine speeds up and stop over white dot in green area

(approximately 28.0 Vdc).

If battery gauge does not perform as specified in steps 2 and 3, stop engine and

go to test 2.

Test 2. Test battery voltage to battery gauge (malfunction 15, test 2).

Check frame ground to multimeter.

a. Set multimeter to RX1 scale.

b. Connect negative lead to panel ground on instrument cluster.

c. Touch positive lead to battery gauge bracket. Continuity should be found.

Ensure instrument panel is grounded.

d. If continuity is found, reinstall battery gauge on instrument cluster

(WP 0094 00) and recheck battery gauge operation.

e. If continuity is not found, remove alternator (Prestolite) (WP 0089 00) or

(Leece-Neville) (WP 0090 00) and check for corrosion around alternator body.

END OF TESTING!

20. TACHOMETER INOPERATIVE

0012 00-17