Obd2 To Obd1 Alternator Wiring Diagram. Obd1 ecu to obd2 alternator honda tech forum discussion. The old engine (obd1) had a 2 wire connector, and the new engine (obd2) has a 3 wire.

Use our vehicle fit guide to find the correct one for your ride. Although, connectors a b d. Switch the two outer wires with each other (green wire with a white stripe, and the green wire with the yellow stripe).