Operation CHARM
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GMC Truck
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1994
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G 3500 1 Ton Van V8-350 5.7L
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Repair and Diagnosis
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Lighting and Horns
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Backup Lamp
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Testing and Inspection
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Preliminary Checks
Preliminary Checks
1.
Verify condition of TURN-B/U fuse. If blown, locate and repair source of overload. Then, replace fuse.