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Figure 3. Instrument Panel and Retaining Hardware.
Table 1. Blackout Headlamp Does Not Operate Continued.

Field Maintenance Manual For Military 621G Scraper -2 Page Navigation
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TM 5-3805-296-23-2
0140
Table 1. Blackout Headlamp Does Not Operate Continued.
0140
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Blackout Headlamp Does
5. Disconnect connector T-C1
Not Operate Continued
(WP 0012, Figure 196) from
connector J-C7
(WP 0012, Figure 197).
6. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure resistance
Proceed to step 3.
between connector T-C1
Resistance Greater Than 5.0 Ohms
terminal 1 (WP 0012, Figure 196)
Replace blackout headlamp wiring
and connector T-C2 terminal 1
harness (WP 0380).
(WP 0012, Figure 194).
Proceed to Test Step 14.
7. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure resistance
Proceed to Test Step 6.
between connector T-C1
Resistance Greater Than 5.0 Ohms
terminal 2 (WP 0012, Figure 196)
Replace blackout headlamp wiring
and ring terminal ground
harness (WP 0380).
(WP 0012, Figure 195).
Proceed to Test Step 14.
Test Step 6. Test Chassis Wiring
Harness for High Resistance or
Open.
1. Disconnect connector J-C8
(WP 0012, Figure 100) from
connector W-C1
(WP 0012, Figure 99).
2. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure resistance
Proceed to step 3.
between connector J-C8
Resistance Greater Than 5.0 Ohms
terminal 29 (WP 0012, Figure 100)
Replace chassis wiring harness
and connector J-C7 terminal 1
(WP 0305).
(WP 0012, Figure 197).
Proceed to Test Step 14.
3. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure resistance
Proceed to Test Step 7.
between connector J-C7 terminal 2
Resistance Greater Than 5.0 Ohms
(WP 0012, Figure 197) and
Replace chassis wiring harness
ground.
(WP 0305).
Proceed to Test Step 14.
0140-8


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