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10 amp fuse blows out

Discussion in 'Gen 3 Prius Audio and Electronics' started by Taxi/Limo, Jan 11, 2017.

  1. Taxi/Limo

    Taxi/Limo Active Member

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    Hello All
    I ran a wire from the 12 volt battery on a 2010 Prius directly to my taxi top light. I put an in line fuse between the two but the 10 amp fuse blows out. So I put a 15 amp fuse in
    Is 15 amp to much?
    It's funny I have a dash cam hooked up to the same power source with a 2 amp fuse and it does not blow out

    Thanks
     
    #1 Taxi/Limo, Jan 11, 2017
  2. xliderider

    xliderider Senior Member

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    Generally, it's not a good idea to put a higher amperage fuse in place of a lower one that keeps blowing.

    The fuse is meant to fail before any wiring is melted and fires start. So putting in a higher amp fuse exposes you to fire risk.

    You should investigate why the 10 amp fuse is blowing. How did you route the wire from the battery to the taxi light? If you went up through the hatch weather seal, check the wires and make sure that the insulation is intact and there are no shorts to the metal body (dead shorts).

    If you have a multimeter, check the resistance on your taxi light and at the wire where it connects to the battery.
     
    #2 xliderider, Jan 11, 2017
  3. Montgomery

    Montgomery Senior Member

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    He's running the wire directly from the battery. The wire he is using may not be able to hold that much amps and is running warm. He may want to run the wire from a power source, not directly from the battery. I use to have this problem back in the day hooking up fog lamps. Going straight from the battery always ran hot and eventually melted my wires.
     
    #3 Montgomery, Jan 11, 2017
    Dyjital likes this.
  4. xliderider

    xliderider Senior Member

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    Well, then a smaller gauge wire (thicker) should be used. But 10 amps is a lot of current for a light.
     
    #4 xliderider, Jan 12, 2017
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