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Wiring an LED to CEL?

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Old Aug 7, 2012, 07:21 PM
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Question Wiring an LED to CEL?

I'd like to take advantage of the CEL-flash for knock but my a/f gauge is mounted on my steering column and blocks the CEL. I was hoping to get around this issue by wiring in an LED.

I've been away from the forums for a while but seem to recall reading that somebody did something similar in the past. Unfortunately, I can't seem to find the thread and I have no idea where to start with a modification like this. Is there a wire in the ECU harness that I can tap?

Many thanks in advance.
Old Aug 8, 2012, 09:39 AM
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Check-engine light control ground is pin 22 on the evo 9 ecu
Old Aug 8, 2012, 02:55 PM
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Originally Posted by boosted91t
Check-engine light control ground is pin 22 on the evo 9 ecu
Great, thanks. So I can just splice into that? Are there any recommended How-To's for this kind of thing?

Just don't want to fry my ECU...
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