From Bearded Tesla Guy.
The Tesla Cybertruck ships to customers with 2 power feeds, allowing owners to add powered accessories to the truck, and be able to integrate them into the Tesla Screen. This seamless experience s what sets Tesla apart, but it is also on the first ever 48v architecture truck, meaning its not exactly plug and play.
There is some work involved in doing this to your Cybertruck, but it is so straight forward that it’s almost impossible to mess it up. On top of that, Tesla has included 2 power leads to chose from, giving a wider range of flexibility in what and where you install accessories. There are some steps that have to be followed that are different than other accessories you may have powered on other cars in the past. Not to worry, I will cover EVERYTHING you need to know right here!
The Cybertruck’s first power feed is on the roof on the passenger side, underneath the cover for the forward most mounting point for a roof rack. The second power feed is under the hood, behind the frunk liner on the passenger side. Both of these feeds are able to be turned on and off right on the Teslas screen. They both have their own draw and can support up to 400 watts each.
In this DIY install, I am utilizing the frunk power feed, but the process will be the same for the roof mounted power feed, just in a different location. The first thing we need to do is step down 48v power feed to 12v to support our 12v light bars. To do this, we need a regulator, sometimes called a step down, or converter.
Next you will need to decide if you want everything on this feed to power on together, or if you want independent control of each accessory on that power feed. If you want all on or off at the same time, then all you have to do is wire everything directly to the 48v-12v regulator. If you would like to be able to turn on some, but not all accessories at the same time, you will need a switch.
In my case, I chose a switch panel that was wireless, and allowed multiple accessories. The switch has 6 slots and numerous labels to properly label everything. Because it is wireless, I dont have to worry about wiring this up to anything under the hood, meaning I can install in the cab anywhere without the need for wiring. It is powered by 2 AAA batteries, or you can use a USB-C cable.
Once you have the junction box installed connected to the 48v-12v regulator, you can now wire up each accessory, positive and negative wire, to each terminal in the junction box, which correlates to a specific button on the wireless switch. Now, just turn on the power feed and use the wireless switch to turn on individual accessories and you are done!
With a limit of 400 watts, my current configuration comes up to 318 watts. That gives me enough room to add one more set of lights and still be safely under the limit. Although there are alternative options out there, make sure you keep an eye on power so you dont exceed that magic 400 watt number.
Wireless Switch Panel –
48v-12v Regulator – https://amzn.to/3CNqDow
20" Light Bar On Front – https://amzn.to/435A79i
18w Side Lights – https://amzn.to/4k7J5Zw
60w Rear Flood Lights – https://amzn.to/4ia9MuQ
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