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.

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.

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.