Cut a pair of red electrical wires with wire cuttersone wire for low beam the other for high beam to extend from the headlight control switch to the headlights bulb socket. See the lighting diagram below tip.

Freightliner Flc Headlight Wiring Harness A06 45021 000
How to wire a headlight. Determine where you want to mount the toggle switch. Press inward on the side tabs of the headlight wiring harness on the rear of the headlight. Unplug the headlight wiring harness from the non functioning headlight. How to rewire a headlight step 1. Ok so lets get to wiring. Just make sure the gauge is ok for what you want.
You can buy trailer wire cable to run wiring to the back of a car. Route the extended wires to the headlight socket. So use the right size wire. Its cheap by the foot and protects the wiring from any cuts wear etc. The switch should be close to the old switchs location so. Its fully insulated and contains up to 7 wires.
These five headlight upgrades are your best bet to improve your night vision without blinding anyone else on the road. Lift the negative battery cable off the. Use these four simple steps to determine if your bad headlight or taillight is caused by a burnt out bulb a corroded socket or a bad wire. Many new car bulbs are easily accessed from under the hood by turning a retaining ring and pulling the bulb socket out but if you have to access the bulb by. Connect the positive lead from the voltmeter to the positive wire on the headlight wiring harness. Loosen the negative battery terminal nut with your crescent wrench.
Prop open the hood. The positive wire should have power coming through it. I installed these on a 2019 gmc canyon. Connect the negative lead from the voltmeter to the negative battery terminal. Thanks to andrew at benebolt for providing the bulbs for todays review. Join the extended wires to the switchs high and low beam wires using butt connectors.
How to wire headlights and parking lights to a toggle switch step 1. This video features benebolt ultimate series led headlight bulbs. Locate the existing wires for the old headlightparking light switch that you are replacing. Turn off your vehicle.