Diagnose dead headlights with our step-by-step troubleshooting guide. Learn to check fuses, bulbs, relays, and wiring—plus upgrade tips for reliable LED replacements.

There are multiple reasons why your headlight stopped working—and none of them are good. Here's a step-by-step guide on how to replace the part that is broken.

In addition to the stock and LED headlights, we also brought along a pair of Philips’ X-tremeVision direct replacement bulbs to see how they would stack up as a low-cost option.