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The diagnostic port does not have power. Is there a specific fuse for this?

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Yes there is a fuse for the OBD port. You neglected to mention what vehicle you are working on.

QUICKTIP How to fix Vehicle OBD2 port that won power scantool

Posted on Nov 13, 2014

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No power to diagnostic port or fuel or ignition or starter pulse 03 vibe any ideas


All these have different fuses, except a main fuse that supplies power to the different fuses. Check those first. Check power from the battery to the fuse panel. Could be a bad fuse panel. If you check voltage with a volt meter, does it show any voltage at the fuses? If 0, then look to the wires first. If they show varying voltage(like2,3,4.5,or 6) suspect the fuse panel. The voltage should be 0 or battery voltage.

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Just fixed mine- Cigarette lighter had a blown fuse , which is also the fuse for the diagnostic port. Check your owners manual to locate diagnostic port fuse,

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OBD II won't connect to computer...Therefore, I cannot get truck inspected


I have found one car that the OBDII wouldn't read anything when connected to the diagnostic port, it turned out that the fuse for the cigarette lighter had blown, and that fuse also powered the diagnostic port. Can't remember what vehicle it was, but check your fuses, hope it's that simple. Let me know.

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1 Answer

Diagnostic


Check your fuse panel for a fuse panel. You are probably not getting power to your diagnostics port on your vehicle. I do not remember which fuse the port is under but just look for the blown one.

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