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1991 Chevy Lumina SERVICE ENGINE SOON light

Tiny
PILOTBILL
  • MEMBER
  • 1991 CHEVROLET LUMINA
  • 280,000 MILES
Is there any way to reset a onboard computer that keeps flashing a CODE 12?
Thursday, January 26th, 2012 AT 10:42 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Might want to check if the terminal B of the ALDL is shorted to ground
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Thursday, January 26th, 2012 AT 11:08 PM
Tiny
PILOTBILL
  • MEMBER
  • 78 POSTS
Could you tell me how to check to see if TERMINAL B is shorted to ground? Thank You.

Replied on January 26, 2012
Might want to check if the terminal B of the ALDL is shorted to ground
Tiny Answered by rasmataz (expert)
60,177 answers provided
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Friday, January 27th, 2012 AT 3:02 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Get a DVOM and insert the pos. Lead on it to the B terminal and black lead to ground-any reading indicates its shorted out-
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Friday, January 27th, 2012 AT 6:32 PM

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