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Old 11-29-2018, 06:49 PM   #6
intothelabyrinth
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Join Date: Mar 2012
Location: Bowling Green, KY
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One side goes to the test connector (red or pink wire) and the other side goes to 12v... Basically the ecu grounds the test connection when it senses a rich condition, which lights up the light, then un-grounds it when its lean. It should cycle rich for a sec, then lean, back and forth.
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