I had the same problem recently. I had to bring the fuse in to the auto part store to match up the size. But I found a picture that may help you figure it out.
If you have a voltmeter, and you remove the fuse, you can put the positive lead to one side of the fuse terminal, and the negative lead to ground. The fuse terminal that registers 12Vs, is the hot terminal.
You certainly need to get the fuse tap in the correct way. But the fuse itself does not have a positive and negative side.
Ok the video I watched he showed both fueses had the load side on one side and the draw on the other. It's confusing to me so I keep holding off on doing the install now.
I assume you mean 5A (amps). Cars have 12V systems, not 5V. You can't plug a 5V device into a 12V system.
No. One fuse is the original fuse supplying power to the original circuit. Put that in the bottom row (according to how he is holding it in the video.) The second fuse is for your tap. So, if you need 10A, then the second fuse should be 10A. But the tap itself should tell you what the max Amperage is. Don't put in a fuse larger than what it is rated for.
Under Input Power, it says MAX 1A (It split on two lines, so it was difficult to see). I'm sure a 5A fuse will be fine.So this is from the Blackvue page on my DashCam. All of it is in V.
So how do I know what fuse I need to put in that slot? Will a 5a fuse do?
The fuse is to protect the wiring, so it doesn't overheat and cause a fire. So, you never want to put a bigger fuse than the wire can handle. But it's okay to use a smaller fuse. Of course, you don't want to consume more power than the wire and fuse can handle either.
