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Figure 2. Battery Cables and Battery Disconnect Switch.
Figure 4. Start Relay.

Field Maintenance Manual For Military 621G Scraper -2 Page Navigation
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TM 5-3805-296-23-2
0104
Table 1. Engine Will Not Crank Continued.
0104
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Engine WIll Not Crank
Test Step 5. Test Main Relay Supply
Continued
Voltage at Circuit Breaker Panel.
1. Remove fuse F13 from
circuit breaker panel
(TM 5-3805-296-10).
2. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-296-10).
3. Using digital multimeter
Voltage 18 to 25 V Proceed to Test
Step 6.
(WP 0540), test for voltage
Voltage Less Than 18 V Replace
between fuse F13 left terminal
(Figure 3) and ground.
fuse panel wiring harness (WP 0515).
Proceed to Test Step 27.
Figure 3. Testing Voltage to Fuse F13.
0104
0104-6


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