Need help tapping into the Right ACC and B+

[TvrCD272]

Hi all,

I got a video rear view camera display for my van as I couldn't see out with all the kids and headrests. This unit doesn't come with installation instructions to my surprise when I opened the box. I ran all the wires, and have the ground (black), ACC (red) and B+ (yellow) next to the fuse box. I would like to ask for help as to which fuse should I tap into for the red and yellow. My vehicle is 2020 Kia Sedona, which should be the same model year as 2016 on. Car has the basic key start and not the push button.

Thanks in advance!

Picture 1 = The head unit to display the rear and the left and right blind points
Picture 2 = Completed installation of rear view camera
Picture 3 = Location of fuse box
Picture 4 = Opened fuse box cover with the 3 cables ready to go
Picture 5 = Fuse box layout
Picture 6 = Fuse box label
Picture 7 = The three cables that need to be connected
Picture 8 = The type of vehicle (Kia Sedona) that I am working on

 

[Diver300]

You may not be able to get ground from the fuse box. My first suggestion for that would be to put it under the mounting bolt for the fuse box.

As for the other wires, you'll just have to test which fuses turn off when the power is off. For a dashcamera, it doesn't matter if you connect the red wire to something that comes on when you open the door, when you turn the key to the first position, or when the engine runs. Similarly, it doesn't matter if that turns off when the engine stops or 20 minutes after you lock the car.

The function of the fuse can give you a guess as to whether it turns off when the ignition is off. However some modules are powered all the time, even though they only work when the ignition is on, and some things like the interior lights will turn off after 20 minutes or so after the car is left and the fuse may then have power removed.

It's best to get a voltmeter and measure the voltages with the ignition on and with the ignition off. If you find a feed that is on all the time, test that it does stay on for half an hour after you lock the car.

 

[TvrCD272]

Thank you. I will do the ground first and get a voltmeter. Thanks!

 

[shokjok]

Consult your Kia dealer service department for a fuse wiring diagram or suggestions for hookup.

 

[KeepItSimpleStupid]

A couple of points. The little exposed, but recessed areas on the fuse can be used for probing one you find a ground somewhere.

if you know the circuit, measuring the voltage "Across the fuse" using those points an help you pinpoint a blown fuse. Consider a switch, lamp and a battery. measure across the switch. Either `0 or 12v. if it's 12V and the switch is ON, you likely have a blown fuse.

Some vehicles have "retained accessory power". Some don;t even have an ACC. measring say the cig lighter with the door open and with retained acc power can really mislead you. The door open keeps the cig lighter, radio etc powered.

Cig lighter or aux power can be on always or on in ACC.