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Table 1. Engine Will Not Crank Continued.
Figure 18. 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 24. Test Engine Interface
Continued
Wiring Harness for High Resistance
or Open.
1. Disconnect connector W-C16
(WP 0012, Figure 87) from
connector CL-C3
(WP 0012, Figure 86).
2. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure resistance
Proceed to step 3.
between connector CL-C3 terminal
Resistance Greater Than 5.0 Ohms
12 (WP 0012, Figure 86) and
Replace engine interface wiring
connector CL-C15 terminal 1
harness (WP 0211).
(WP 0012, Figure 323).
Proceed to Test Step 27.
3. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure resistance
Proceed to Test Step 25.
between connector CL-C3 terminal
Resistance Greater Than 5.0 Ohms
12 (WP 0012, Figure 86) and
Replace engine interface wiring
connector CL-C16 terminal 1
harness (WP 0211).
(WP 0012, Figure 324).
Proceed to Test Step 27.
Test Step 25. Test for Main Cab
Wiring Harness for High Resistance
or Open.
1. Disconnect connector CG-C1
(WP 0012, Figure 283) from
connector W-C8
(WP 0012, Figure 282).
2. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure for resistance
Proceed to Test Step 26.
between connector W-C8 terminal
Resistance Greater Than 5.0 Ohms
26 (WP 0012, Figure 282) and
Replace main cab wiring harness
connector W-C16 terminal 12
(WP 0505).
(WP 0012, Figure 87).
Proceed to Test Step 27.
0104-29


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