Operation CHARM
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GMC Truck
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1994
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S15/T15 Sonoma P/U 2WD L4-134 2.2L
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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.
Check condition of TURN B/U Fuse. If fuse is blown, locate and repair source of overload. Replace fuse.
2.
If fuse is not blown, proceed with the Diagnosis (Refer to
Diagnostic Charts
).
Diagnostic Charts