1987 Chevrolet El Camino Service Engine Soon Light Comes On While Driving

1987 CHEVROLET EL CAMINO
100,000 MILES
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SKEET7153
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  • 2 POSTS
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
Feb 17, 2013 at 5:08 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
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.
Feb 17, 2013 at 5:12 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
The diagram is just to show location of pins A and B. All those pins may not apply.
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Feb 17, 2013 at 5:21 PM
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