Everything on Fuse 21 Circuit Dead, Fuse Not Blown

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  • mattnsb
    Noobie
    • Dec 2025
    • 1

    #1

    Everything on Fuse 21 Circuit Dead, Fuse Not Blown

    I removed my OBC and used an OBC delete panel to create a magsafe cell phone charging mount and USB port, connected to the "always on" power supply that previously went to the OBC. Since it's always on, it has a power button. Everything worked great. Then, the other day, I went to power it up, and when I hit the button, the stereo and everything else on that circuit (fuse 21) died. It acted like a blown fuse, but the fuse was intact. I swapped it anyway, but that did not resolve the issue.

    Today, I swapped the "always on" power into my little cell phone charger OBC delete panel with switched power, and it worked without a hitch. No shorts there, and now it's not connected to the Fuse 21 circuit. But still the stereo, cabin light, and trunk light are dead. Further troubleshooting, I had a closer look at the fuse box. I did notice that Fuse 21, while seated, feels looser than the other fuses. It seats, but it's wobbly. I tested power there, and got 2-3v on the outer socket and 12v on the inner socket. Is my problem there? Seems I could tighten up the fuse connection, but I'm afraid to start digging around unless the experts think I should.

    Any ideas?

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