If you're installing a car amplifier that needs a turn-on signal or a low-power device that requires 12 volts, you can get the voltage you need by tapping into your vehicle's fuse box with a fuse tap.This handy little piece of hardware adds a new fused circuit to the factory electrical systemsafely and neatly. In this article, we present step-by-step instructions on how to do it.

This shouldn’t be too hard to figure out. Normally the power rating of whatever you are powering is on the box or in the manual. For example, this car camera runs at 1 Amp. Ideally, your fuse needs to be as close to the amperage rating as possible without going under it. However, with some electrics they can peak over that on start up so start off as close as you can. Fuses are either in a switched live or a permanent live position. So, you need to decide how you want to power the thing you are adding. For example, if you are powering a dash camera, you don’t want it running with the engine off. In which case you’d want a switched live connection so the camera turns off with the ignition. Fuse taps are clever pieces of metal and plastic that can turn 1 fuse position on your fuse box into 2 separate fuse positions. They are a good generic way to separately power an additional circuit.

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This may not blow at the correct amperage or fast enough to protect what ever is attached to that circuit. If you put the fuses in the wrong positions, you may get fuses blowing or electrics getting damaged. This is because the items will be protected with incorrectly rated fuses. a>