codes error (Page 1/1) Atlasway MAY 28, 11:06 AM I was trying to read codes That are stored, if any. And when I jump the ALDL the shift light comes on and no check engine light. What can cause this? I have an 86gt 4spd. 82-T/A [At Work] MAY 28, 11:14 AM quote Originally posted by Atlasway: I was trying to read codes That are stored, if any. And when I jump the ALDL the shift light comes on and no check engine light. What can cause this? I have an 86gt 4spd. I've never heard this before. Generally, if the ECM is good, you should get a code 12 first. What year / engine is this Fiero? Patrick MAY 28, 02:56 PM quote Originally posted by 82-T/A [At Work]: What year / engine is this Fiero? Todd, take a breath. Re-read what you quoted. quote Originally posted by Atlasway: ...when I jump the ALDL the shift light comes on and no check engine light. What terminals are you jumping? Mickey_Moose MAY 28, 03:29 PM First obvious thing to check is to make sure the bulb is actually good. Does the light come on when you first turn the car on? The next issue could be the plug on the back of the cluster is not connected correctly - could have a couple pins shorting each other out.