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Truck did not pass smog because check engine light did not turn on

Tiny
YOLOS94
  • MEMBER
  • 1997 DODGE RAM
  • 5.9L
  • V8
  • AUTOMATIC
  • 150,000 MILES
I went to get my truck smog and it didn't pass because they said that the check engine light didn't come on and that the obd2 scanner couldn't communicate. I don't know how to fix it.
Saturday, January 4th, 2020 AT 2:38 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
Hi,

What I need you to check is for power to pin 16 on the data link connector under the dash. I attached a pic below to help orient you with its location.

Simply use a test light to see if it lights indicating there is power. Here are a couple links you may find helpful:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-check-wiring

Also, let me know if the truck is running properly.

Take care,
Joe
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Saturday, January 4th, 2020 AT 7:44 PM

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