Building a 12 Volt System for a Military Humvee - Step by Step Guide

TLDRLearn how to build a 12 volt system for a military Humvee, including adding fuses before relays for safety, wiring up exterior lights and 12 volt components, replacing 24 volt bulbs with 12 volt LEDs, and using a flasher relay for blinkers. Also, install an ignition switch for convenience and security.

Key insights

🛠️Add fuses before relays in the 12 volt system for safety purposes.

🔌Wire up exterior lights and 12 volt components using existing harnesses and connectors.

💡Replace 24 volt bulbs with 12 volt LEDs for better compatibility and energy efficiency.

Use a flasher relay designed for LED lights to make the blinkers work with the 12 volt system.

🔑Install an ignition switch to control the system and enhance security.

Q&A

Why do I need to add fuses before relays in the 12 volt system?

Adding fuses before relays provides protection for your vehicle and passengers in case of a short circuit.

Can I use existing harnesses and connectors to wire up the exterior lights and 12 volt components?

Yes, using the existing harnesses and connectors can simplify the wiring process and ensure proper compatibility.

Why should I replace 24 volt bulbs with 12 volt LEDs?

Switching to 12 volt LEDs provides better compatibility with the 12 volt system and offers energy efficiency benefits.

What is a flasher relay and why do I need it for blinkers?

A flasher relay is an electronic device that controls the blinking of the turn signals. It is necessary to use a flasher relay designed for LED lights when switching from a 24 volt system to a 12 volt system.

Why should I install an ignition switch for the 12 volt system?

An ignition switch allows you to control the system and provides convenience and security by requiring a key to start the vehicle.

Timestamped Summary

01:35Add fuses before relays in the 12 volt system for safety purposes.

03:47Wire up exterior lights and 12 volt components using existing harnesses and connectors.

05:06Replace 24 volt bulbs with 12 volt LEDs for better compatibility and energy efficiency.

07:11Use a flasher relay designed for LED lights to make the blinkers work with the 12 volt system.

09:23Install an ignition switch to control the system and enhance security.