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Buick
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1994
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Regal V6-191 3.1L VIN M SFI
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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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Initial Inspection and Diagnostic Overview
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Circuit Operation
Circuit Operation
Voltage is applied at all times through the R/CMPT REL Fuse to the Transaxle Range Switch. Whenever the gear selector lever is shifted to
"REVERSE," the Switch closes and voltage is applied to the Backup Lights.