Should I put higher amp fuse for cigarette lighter?

I wanna add 2 to 4 cig lighter sockets to my 2008 Honda fit which only came with one. It currently uses 7.5 for ACC. How much can I safety increase it to?

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  • Sky
    Lv 7
    2 months ago
    Favorite Answer

    If the wiring going to the current lighter socket is a heavy enough gauge, you could, but if it's thin wire then it couldn't safely handle that amperage with a lot of heavy loads.  You'd be much better off running a separate circuit with 12 or 14 gauge wire going directly to the battery and running in through a hole in the firewall.  You can install an in-line fuse holder either near the connection at the battery, or near the bank of lighter sockets.  If the sockets are distributed around the car then each one should have its own fuse, or keep it simple and just have one 30 amp fuse near the battery.  You'd have to be sure to never leave loads plugged in when the car is off or you'd drain the battery, or alternatively you could design it with a heavy duty relay that switches on either with the key in the on position or when the alternator is running and producing current so that the circuit is automatically switched off when the car is shut off.

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  • M.
    Lv 7
    4 weeks ago

    Since you have to add the additional sockets and wiring, just add some fuseholders to the circuits as you add them.  Then each one will have its own fuse. 

    Don't do what you are asking about.

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  • 2 months ago

    The wiring is going to dictate how much you can pass through that circuit.

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  • 2 months ago

    That's how people burn their cars to the ground. Mess with the cigarette lighter. Buy a decent USB add on and hook it up per the instructions. You have to know total Amps when plugging things into the cig lighter. Some USB devices use less than one amp.

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  • 2 months ago

    Normally the fuse is the weak point in the wiring so that it blows before a wire burns out. If you put a higher rated fuse in then it may no longer be the weak point and you might find the first that you know that you pulled too much power is a wire burns out somewhere. That could cause a fire. If you want to add more sockets you need to have wiring that can handle it. So leave the fuse alone, run an entirely new wire for your four outlets and use a fuse appropriate for that.

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  • Anonymous
    2 months ago

    You have to rewire the whole circuit to put a bigger fuse.  Best to add an independent circuit with an inline 10A fuse.  Put a toggle switch to turn off the circuit when the car is not running.

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  • Anonymous
    2 months ago

    You can't - the wiring is too light gauge to support higher amperage. You'd have to do a complete rewire. Not an easy job.  But go ahead and do it anyway. Car fires are fun to watch as the occupants dance around in a total panic, especially when they aren't wise enough to carry a fire extinguisher in their vehicle. . 

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