can someone tell me where to find the plug to read my codes on a 90 model trooper and what it looks like?

 

absosecur - try your local Snap On Tools dealer or a local foreign car shop. I know a local foreign car shop here has an OBD - I reader and a set of connectors, one of which we found to fit my '91 Trooper.

http://www.snapon.com/

Mr. Movida