TM-9-2350-311-20-1

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

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 1185 of 1275

TM9-2350-311-20-1

GO 1 VTM CONNECTIONS AND CHECKOUT

CONTINUED

1

2

CONNECT BATTERY TO VTM:

.

- PULL OFF VTM power switch.

.

Connect PI of power cable W5 to J1 on VTM.

- Connect red clip El of cable W5 to positive

terminal of M109A2/A3/A4/A5 battery.

- Connect black clip E2 of cable W5 to negative

terminal of M109A2/A3/A4/A5 battery.

Make sure all connections are

correct and secure.

POWER UP.

.

- PUSH ON VTM power switch.

- Verify that display indicates .8.8.8.8 for

approximately 2 seconds and then

changes to -----

Does the VTM display .8.8.8.8 and then

change to --- -?

NOT E

Aline white mark

on connector P1

with large slot in

keyway of J1.

Twist locking

ring until it clicks.

If only a portion of .8.8.8.8 or

---- is displayed, a display

module may be burned out.

Refer to TM 9-4910-571-12&P

for module replacement.

- Set power switch to PULL OFF.

- Check W5 for proper connections. Red

clip El on positive terminal, black clip E2

on negative terminal.

- Check and clean all battery connections

and interconnecting cables.

- PUSH ON VTM power switch.

1

Does VTM display .8.8.8.8 and then

change to- -- -?

Go to step 4,

Go to step 3,

Figure 2, sheet 4.

Figure 2, sheet 3.

Figure 2, Sheet 2 of 20

I-8

NOTE