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Service Engine soon stuff

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Old Sep 2, 2002 | 11:30 PM
  #1  
Red_Demon's Avatar
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From: Currently State College Pa, Usually, I live out side of philly.
Service Engine soon stuff

From a previous post I read this bit of information.

DISPLAYING THE TROUBLE CODES
Run a wire/hairpin from Pin 6 to Pin 12 with the ignition off (although on later cars it should be from Pin 5 to Pin 6), then turning the ignition to the on position without starting the engine will flash the "Service Engine Soon" light in the following sequence: flash, pause, flash-flash, long pause flash, pause, flash-flash, long pause flash, pause, flash-flash, long pause Following this "12" code repeating three times will come any trouble codes stored, flashing each of them three times. If you do not see the "12" flash three times, your diagnostic circuit is defective.
Some vehicles will display stored trouble codes, then "12" again, followed by energizing "most system controlled relays." The fuel pump relay will not energize. The idle air control valve will fully extend to enable checking minimum idle speed.


Can someone explain where the 12 will flash? I'm confused by how a 12 will flash.. I'm trying to figure out what is wrong..
someone help me!
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Old Sep 3, 2002 | 02:21 AM
  #2  
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From: Philadelphia, PA
Car: 1989 Iroc
Engine: 5.7
Transmission: TH700R4
Check Engine light will blink once, then twice, then pause for 3 seconds. It will blink code 12 three times, then go on to the next code (if there is one showing) and blink that out three times in a row. If the code was like 44 or something, it would blink 4 times...then pause, then blink 4 times. If no code's are stored, it will just blink out 12 over and over and over again.

Joker
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Old Sep 3, 2002 | 06:50 AM
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Red_Demon's Avatar
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From: Currently State College Pa, Usually, I live out side of philly.
awsome thanks for the info!
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