VOLTAGE TEST -726280411

TM 9-2320-364-20-1

Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical

circuits, a direct short may result. Damage to equipment, injury, or death to personnel may occur.

Circuit breakers CB5, CB6, CB12, CB20, CB22, CB23 and relays R3, R13 - R19, R26, R28, R32, R33 are

always electrically hot and can cause severe injury to personnel. Care must be exercised when working

under the electrical circuit board cover.

VOLTAGE TEST

(1) Remove 15 screws and two

ECB covers.

(2) Set multimeter select switch to

volts dc.

(3) Connect positive (+) multimeter

lead to circuit breaker CB22 input

(upper) terminal.

(4) Connect negative (- ) multimeter

lead to a known good ground.

(5) Turn ON ENGINE switch

(TM 9-2320-364-10).

(a) If 10 to 14 vdc are not present,

turn OFF ENGINE switch and

repair wire 241 (see schematic

Fig 2-3) or notify DS

Maintenance.

(b) If 10 to 14 VDC are present, turn

OFF ENGINE switch and go to

Step (6) below.

(6) Connect positive (+) multimeter

lead to circuit breaker CB23 input

(upper) terminal.

(7) Connect negative (- ) multimeter

lead to a known good ground.

(8) Turn ON ENGINE switch.

(a) If 10 to 14 vdc are not present,

turn OFF ENGINE switch and

repair wire 240 (see schematic

Fig 2-3) or notify DS

Maintenance.

(b) If 10 to 14 vdc are present, turn

OFF ENGINE switch and go to

Step 5 of this Fault.