No power to the OBD port which fuse should I check?

2008 CHEVROLET SILVERADO
220,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
Avatar
COOPER2025
  • MEMBER
  • 1 POST
No power to the OBD port, wonder which fuse number I should check first.
Thanks
May 14, 2025 at 10:58 AM
Advertisement
Avatar
AL514
  • ✓ASE Certified Mechanic
  • 5,587 POSTS
  • ASE Certified Mechanic
Hello, power for the DLC (pin 16) comes from the LTR Fuse 53 20amp in the under-hood fuse block. I'll post a wiring diagram of the circuit as well.
May 14, 2025 at 1:22 PM
Avatar
AL514
  • ✓ASE Certified Mechanic
  • 5,587 POSTS
  • ASE Certified Mechanic
Here is the wiring diagrams for the Data link connector, notice power also goes to the I/P Accessory power outlet, so I would make sure nothing fell into the power outlet and shorted it out, blowing the fuse.
Images (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
May 14, 2025 at 1:32 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.