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 180 of 828
TM 9–2350–311–20–2
Change 2
3–69
Repair or replace ground
wires (para 8–13).
Replace wire 645 (para
8–13).
1.
Ensure that hydraulic pressure in power pack
main accumulator assembly is below 925 psi
(6378 kPa).
2.
Place red multimeter lead on wire 645 post of
electromagnetic relay and black lead to ground.
3.
Check for voltage.
Is battery voltage present?
yes
no
K
1.
Turn MASTER and CAB POWER switches to
OFF.
2.
Place one multimeter lead on electromagnetic
relay ground post and other lead to ground.
3.
Check for continuity.
Is continuity present?
CONTINUED ON NEXT PAGE
CONTINUED FROM STEP J
yes
no
L
–
+
RELAY
GROUND
POST
Replace electromagnetic
relay (para 8–13).
POST OF
RELAY
–
+
WIRE 645
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