which terminal powers the scanner on the obd on a 1994 chevy 2500 4x4

Asked by Mar 08, 2015 at 03:55 PM about the 1994 Chevrolet C/K 2500 Cheyenne Extended Cab SB

Question type: Maintenance & Repair

Scan tool won't connect with obd plug.  Already checked all the fuses.

1 Answer

920

The OBD connector is a suggestion and companies are not forced to adhere to all standards and formats. Many OBD scanners can run from power at the OBD connector while others must run from an internal 9V battery. Only some connector pins are standard and not every OBD connector can provide power to drive an OBD scanner.

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