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Check engine light won't come on 200

posted by  burchmania on  Fri Jan 28 20:06 CST 2011
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last visit: Fri Dec 7 13:22 CST 2012
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I have a 1990 240 (California car). The check engine light will not come on when the key is turned (it's supposed to come on with oil, abs, and all the others), and then turn off after the car starts.

I replaced the bulb today. Having a hard time finding what controls this thing so I can troubleshoot.

Thank you








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Check engine light won't come on 200

uid 27's pic
posted by  Art Benstein on  Sat Jan 29 02:52 CST 2011
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last visit: Fri Oct 17 20:10 CST 2014
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It comes from pin 22 on the ECU in parallel with pin 3 on the ICU, on a pink wire. That supplies the ground side. The hot side is the same voltage that powers all the other warning lights and gauges.
--
Art Benstein near Baltimore

When fish are in schools they sometimes take debate.







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