robhaupt101 Posted December 20, 2014 Share Posted December 20, 2014 hi. I have an old 95 Chevy caprice lt1 engine. I am putting it into a 69 firebird. I am currently working on the wiring for it. my question is how do I wire in the check engine light? any other helpful tips on wiring the engine would be greatly appreciated. Quote Link to comment Share on other sites More sharing options...
Redwine automotive Posted December 20, 2014 Share Posted December 20, 2014 Any bulb will work,one side to fused key on power and pin 9 of the blue connector. Let me know what else you need. - Quote Link to comment Share on other sites More sharing options...
deja Posted December 20, 2014 Share Posted December 20, 2014 According to the schematic of the PCM the Malfunction Indicator Signal come from PCM connection D9 (brn/wht wire) to the indicator bulb, the other side of the blub connects to ignition switched +12v Quote Link to comment Share on other sites More sharing options...
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