Hi, See If you Have ground at The Obd2 connector Also. Check your Battery That It's Fully charged. To Check the computer, Power And Grounds, You need a wiring Diagram Of the computer, Look at the diagram And see Where You have Battery, also Ignition feed, and grounds. Carefully Check With a dvom meter. If you Have Power and ground at the Obd2 Connector, Then you should be able To get codes Out of the computer. I'd Check This first.
Hope This Helps You,
Sunday, August 1st, 2010 AT 7:38 AM