TM-9-2350-261-20-1

CARRIER, M113A2, M577A2, M1064, M1068, M1059 AND M901A1

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL - VOLUME 1 OF 4

TM-9-2350-261-20-1 - Page 263 of 346

TM 9-2350-261-20-1

INFRARED PERISCOPE WORKS IMPROPERLY — Continued

0040 00

B3Y

1.

Remove instrument panel cable assembly circuit 27 plug (1)

from instrument panel circuit breaker (2).

2.

Measure resistance between circuit 516 plug (3) and

circuit27plug(1)

.

3.

Does multimeter read 0 ohms?

B3YN

1.

Repair instrument panel cable

assembly circuit 516 (WP 0312 00).

2.

Install original I.R. power pack

(WP029100orWP029300)

.

3.

Verify no faults found.

B4Y

1.

Remove cable assembly circuit 516A plug (1) from

I.R. power pack (2).

2.

Turn MASTER SWITCH to ON (see your -10).

3. TurnI

.R

.POWERswitchtoON(seeyour-10)

.

4.

Measure voltage between cable assembly circuit 516A

plug (1) and ground.

5.

Turn MASTER SWITCH to OFF (see your -10).

6.

Did multimeter read less than 17 volts?

B4YN

1.

Repair front main harness circuit

516A (WP 0312 00).

2.

Install original I.R. power pack

(WP029100orWP029300)

.

3.

Verify no faults found.

004000-4