V8 Quattro V8-3562cc 3.6L DOHC (PT) (1990)
Data Link Connector: Testing and Inspection
DLC Terminal Identification
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Check for voltage supply at black Data Link connectors 1 in vehicle, observe polarity while performing this check:
Terminal 1 = Battery negative (-)
Terminal 2 = Battery positive (+)
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If battery voltage is not obtained, check wiring using wiring diagram, repair as necessary