Kenworth W900A LED Headlights

Frequently Asked Questions About Kenworth W900A LED Headlights

Will these LED headlights fit my specific year W900A?

Our LED headlights are designed to fit Kenworth W900A models from 1961 to 1985 that use the standard 7-inch round headlight configuration. The W900A uses a dual round headlight setup (4 lights total), and our LED replacements are direct plug-and-play units that fit into the existing buckets without modification. If your truck has been modified with rectangular headlights or a different grille setup, you'll need to verify measurements before ordering.

Do I need to upgrade my wiring or add resistors for LED headlights?

Most W900A trucks will not require wiring upgrades for basic LED headlight installation. Our LED headlights are designed to work with the standard 12V system and draw less power than original halogen bulbs. However, some older trucks may experience hyperflashing or dashboard warnings due to the lower power draw. In these cases, you may need to add load resistors or update your flasher relay to an LED-compatible unit. We recommend having a voltmeter handy during installation to verify proper voltage at the headlight connections.

What's the actual light output difference compared to stock halogen bulbs?

Our LED headlights typically produce 3,000-4,500 lumens per bulb compared to 1,000-1,500 lumens from standard halogen H4 bulbs. This translates to approximately 2-3 times brighter illumination with a cleaner, whiter light pattern. The beam pattern is DOT approved and designed to prevent blinding oncoming traffic while significantly improving your night visibility. Most drivers report being able to see road signs and obstacles 50-75% farther down the road compared to their old halogens.

How difficult is the installation process for someone with basic mechanical skills?

Installation typically takes 30-60 minutes for all four headlights and requires only basic hand tools. You'll need to remove the headlight bezels (usually 4 screws each), unplug the existing bulbs, and plug in the new LED units. The main challenges customers face are: accessing the lower headlights which may require removing the bumper on some models, dealing with corroded screws on older trucks, and properly aiming the headlights after installation. We recommend having penetrating oil, a headlight aiming tool or level, and patience for the first-time installer.

Which style options are available and what's the difference in appearance?

We offer several styles for the W900A: classic white LED with chrome reflector housing that maintains the original appearance, black housing options for a more modern look, and models with integrated turn signals or halos for additional visibility. The classic chrome style is most popular for restorations and maintaining period-correct appearance. All styles use the same high-output LED chips and produce similar light output. The main differences are aesthetic - the black housings reduce chrome glare during daytime, while the halo models add a modern safety feature with always-on accent lighting.