I Just Recently Converted To Obd1 And Have My Check Engine Light On. Can Someone Tell Me How To Check My Ecu To Find Out What Code Im Throwing. Thanx

 

if the car was obd0 the conversion harness should have a wire that you just ground that will flash the cel.
if it was obd2 you test it the same way as a obd2. unsure your year so wont go into details

 

It Was Obd0 Before

 

then there should be a wire labled or the person that supplied the harness should be able to tell you what wire (if any) on that harness you can ground and check your codes.
otherwise you will have to find the obd1 pinout for the cel wire to ground that