B0802-00307-BK UTV Turn Signal Kit with 110D Horn

What is the diameter of the small round light? How many millimeters should the hole be drilled?

The diameter of the small round light with a rubber gasket is 1.1 inches.
The hole size should be 0.748 inches (please select the corresponding drill bit size to avoid excessive looseness).

What is the size of the switch?

The dimensions of both the horn switch and the turn signal switch are 21.4 mm*36.6 mm (length x width).

Can the product be compatible with a headlight or Fang light?

We apologize that the current and number of output wires for different products are not compatible, and we do not recommend modification.

If I push the turn signals, there is glow shining from the switches, but once I turn the switch off, the light also turns off. For some reason the Horn/Emergency Lights switch glows. I don’t want my battery to drain because of this?

We understand you don’t want the horn light to stay on and drain your battery. It is normal for the indicator light on the switch to light up after power is supplied.
If you want to turn off the indicator light on the horn, we suggest that you connect the “+” terminal to ACC, and you can achieve this.
ACC is the accessory wire on the vehicle. The exact location of ACC may vary for different vehicle models. We suggest that you search your vehicle model on YouTube to check the exact location, or check the vehicle’s user manual to see if there is a corresponding location prompt.