Wiring the electrical components of a street-legal kit is the most intimidating step for many DIY builders. UTV electrical systems are sensitive, and incorrect wiring can drain your battery, blow fuses, or damage your vehicle's ECU. This guide explains how a typical street-legal kit wiring schematic works and how to connect everything safely.
1. The Core Electrical Layout
A standard street-legal electrical circuit consists of: a 12V battery power source, an inline fuse (to protect the circuit), rocker switches on the dashboard, and the accessory items (horn, LED turn signals, license plate light). Do not wire accessories directly to the battery. Always run them through an inline fuse block or accessory power bar (such as the Polaris Pulse bar) that is only active when the ignition key is turned on.
2. Wiring Turn Signals
A typical turn signal wiring layout uses a three-way rocker switch (Left-Off-Right) and a 12V flasher relay. The flasher relay causes the lights to blink. Wire the key-on positive power wire to the input pin of the flasher relay. Run the output pin of the relay to the central power pin on the rocker switch. Connect the left rocker output pin to the left front/rear turn signal LEDs, and the right rocker output pin to the right front/rear turn signal LEDs. Ground all LED lights to the chassis frame.
3. Wiring the Horn
The horn draws a high amount of current, so it should be wired using a standard 4-pin automotive relay to prevent damage to your dashboard switch. Wire the battery positive terminal (through a fuse) to Pin 30 of the relay. Wire Pin 87 of the relay to the positive terminal of the horn. Connect Pin 86 of the relay to your dashboard push-button switch, and Pin 85 to ground. Ground the other side of the horn to the chassis.