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Service engine soon light comes on while driving.

Tiny
SKEET7153
  • MEMBER
  • 1987 CHEVROLET EL CAMINO
  • 100,000 MILES
Service engine soon light comes on while driving on interstate. How do I get the codes to flash? Ive heard you can jump two terminals under dash to make codes flash. How do I do this
Sunday, February 17th, 2013 AT 5:08 PM

2 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
You use a jumper wire across the A & B terminals at the datalink connector. Turn key just till the dash lites come on, no further. The mil on the dash starts flashing, you count the flashes to get the codes. Your looking for two digit codes.
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Sunday, February 17th, 2013 AT 5:12 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
The diagram is just to show location of pins A and B. All those pins may not apply.
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Sunday, February 17th, 2013 AT 5:21 PM

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