Headlight Wire Color Code

There are a few different headlight wire color code standards in use, so it’s important to know which one applies to your vehicle. The most common codes are: • American Standard – Red is low beam, Yellow is high beam

• Japanese Standard – Green is low beam, Blue is high beam //this seems like an unfinished post?

If you’ve ever wondered what those little wire color code letters mean on your headlight wiring diagram, wonder no more! Here’s a quick rundown of the most common codes: B = Black

G = Green R = Red W = White

Headlight Wire Color Code

Credit: www.fiestastforum.com

What is Yellow Wire on Headlights?

The yellow wire on headlights is the low beam wire. When you have your headlight switch in the “low” position, this wire completes the circuit and allows current to flow to your low beam bulbs. If this wire is not connected, or if there is a break in the wire, your low beams will not work.

What Color Wire is High Beam?

High beam headlights are typically white, and the wire that powers them is also usually white. However, it’s important to check your car’s specific wiring diagram to be sure. If in doubt, consult a professional mechanic or automotive electrician.

What is the Blue Wire on a Headlight?

The blue wire on a headlight is the low beam wire. When you turn on your headlights, the blue wire completes the circuit and allows current to flow to the low beam filament. This illuminates the low beam bulbs and allows you to see while driving at night.

Where is the Ground Wire on a Headlight?

There are two types of headlight ground wires. One type is connected to the metal body of the vehicle, and the other type is connected to the negative terminal of the battery. If your headlight ground wire is not connected properly, your headlights will not work.

How to find headlight, signal light, taillight, brakelight w/o wiring diagram or color code.

Which Headlight Wire is Positive

One of the most common questions we get here at Headlight Revolution is which headlight wire is positive. This is actually a pretty simple question to answer, but it can be confusing for those who are new to working on their own headlights. The positive wire is always the one that goes to the battery, while the negative wire goes to ground.

If you’re not sure which wires are which, simply use a multimeter to test for continuity between the two wires.


Most vehicles have their headlight wire color coded to industry standards. If your vehicle is not equipped with factory-installed headlight sockets, you can look up the standard color code for your make and model of vehicle and purchase the corresponding colored wire. Once you have your wires, follow these simple steps to wire your headlights:

1. Find a suitable location to mount your headlights. Most people choose to mount them on the front bumper or fender, but you can really put them anywhere as long as they’re pointing in the right direction. 2. Use a drill to make two holes for each headlight (one for the power wire and one for the ground wire).

Make sure that the holes are big enough to fit both wires through without being too large. 3. Run the power wire through one of the holes and attach it to the positive terminal on the back of the headlight using a butt connector . Do not connect it yet!

4. Take the other end of the power wire and run it to your battery’s positive terminal . Connect this end using a ring terminal .

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