Normally the connector terminals are soldered to the circuits to repair intermittent connections. You can do an internet search to find places that repair them too. I had a digital cluster that I couldn't fix myself, and used a shop called Advanced Auto Electronics. Had it back in a week. Cost $250.00; less than I was quoted.
There is no connection specific to the Check Engine light. That is turned on in response to the Engine Computer talking to the Body Computer which talks to the instrument cluster. There will be a diagnostic fault code in the Engine Computer indicating the circuit or system with a problem. That code should be read and recorded.
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Monday, June 10th, 2013 AT 10:50 AM