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

Tiny
BTSJOE74
  • MEMBER
  • 2016 RAM 1500
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 129,000 MILES
Which fuse should I check? The check engine light came on, but the reader was not working. Used numerous scanners.
Thursday, April 6th, 2023 AT 10:57 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,110 POSTS
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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Thursday, April 6th, 2023 AT 12:18 PM

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