In preparation for a multitude of electrical devices within the FJ Cruiser, one of the next logical steps for me, was to upgrade the existing electrical system components. There’s certainly nothing wrong with the stock setup as is. But with only a single 12v power port, the FJ lacks the ability to support multiple devices without potentially overloading the stock circuit. So my plan for this particular upgrade was to engineer a system that allowed me to physically separate any add-on electrical ports and fuses from the stock electrical system, as well as add support for more demanding devices, such as an electric winch.
For safety reasons, I should point out that any modifications to the stock electrical system have the potential for causing harm to either the vehicle or the passengers within or both. Building a secondary electrical backup system for accessories does require some knowledge of electrical properties and systems. If you are not comfortable with this type of modification, I highly recommend taking your vehicle to a professional installation shop to have the work done.
That being said, it was time to start digging up all the necessary parts. I actually began my research with the intention of piecing the system together bit by bit. Given the complexity of what I required, I figured this was the only way to achieve my end goal. So imagine my surprise when I discovered that Dirty Parts, a small off-road parts supplier in southern California, was offering a complete dual-battery electrical upgrade kit specifically designed for the FJ Cruiser. Continue Reading →