TM-9-2350-311-20-2

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS

DECEMBER 1993

TM-9-2350-311-20-2 - Page 229 of 828

TM 9–2350–311–20–2

3–117

yes

no

C

CONTINUED FROM STEP B

1.

Place one multimeter lead in socket H of J801 or

J804 connector and other lead to pin C of J803

connector.

2.

Check for continuity.

Is continuity present?

1.

Place one multimeter lead in socket A of J801 or

J804 connector and other lead to ground.

2.

Check for continuity.

Is continuity present?

Replace control box (para

8–16).

Check ground connection

of control box and repeat

step D. If malfunction per-

sists, replace control box

(para 8–16).

1.

Place one multimeter lead on pin A of J803

connector and other lead to ground.

2.

Check for continuity.

Is continuity present?

yes

no

D

CONTINUED ON NEXT PAGE

E

+

Replace control box (para

8–16).

yes

no

+

–

J803

CONNECTOR

PIN C

J801 OR J804

CONNECTOR SOCKET A

+ –

J803 CONNECTOR

PIN A

J801 OR J804

CONNECTOR

SOCKET H