OBD2 is not working?

Tiny
JEREMY BROOKS
  • MEMBER
  • 1999 CHEVROLET BLAZER
  • 4.3L
  • V6
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
It doesn't work.
Monday, August 21st, 2023 AT 4:27 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
Hi,

I attached a pic below showing the data link connector. Check pin 16 (highlighted) for power. It should have power at all times regardless of the key position.

If there is no power, then I need you to check the cigarette lighter fuse in the instrument panel fuse box. That fuse is used to power pin 16 in the DLC. See pics 2 and 3.

When you check the fuse, it is important to confirm there is power to and from the fuse.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Let me know what you find or if you have questions.

Take care,

Joe

See pics below.
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Monday, August 21st, 2023 AT 9:27 PM

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