The check engine light came on, but reader not working?

2016 RAM 1500
129,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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BTSJOE74
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Which fuse should I check? The check engine light came on, but the reader was not working. Used numerous scanners.
Apr 6, 2023 at 10:57 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
The fuse number #44 in the fuse panel under the hood. Here is a guide to help you check it and the fuse location in the images below and I have included the wiring diagrams for the ALDL connector so you can see how it works.

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

I would also check the wiring at the data port. Check out the images (below). Please let us know what happens.

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Professional Diagram for 2CarPros Members
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Apr 6, 2023 at 12:18 PM
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