Frequently Asked Questions About Kenworth W900A Driving Lights

Will these driving lights fit my specific year W900A, and what about W900B or W900L models?

Our Kenworth W900A driving lights are specifically designed for W900A models from 1961 to 1985. The mounting brackets and dimensions are tailored to the W900A's unique bumper design. While some universal lights may physically fit W900B (1985-1987) or W900L models, the mounting points and brackets differ significantly. For W900B and W900L models, we recommend checking our dedicated sections for those trucks to ensure proper fitment and appearance.

What's involved in the installation process, and do I need to drill holes in my bumper?

Most of our W900A driving lights mount using existing holes in the bumper or come with brackets that clamp onto the bumper without drilling. Installation typically takes 1-2 hours and requires basic hand tools including wrenches, wire strippers, and electrical connectors. You'll need to run wiring to a switch in the cab and connect to a power source, usually through a relay. Some customers choose to wire directly to the headlight circuit for automatic operation. If your bumper doesn't have pre-existing mounting points, drilling may be required, but we clearly indicate this in each product description.

What's the difference between halogen and LED driving lights for my W900A?

Halogen lights offer the traditional look many W900A owners prefer, with warm white light output and lower upfront cost. They typically draw 55-100 watts per light and last about 500-1,000 hours. LED driving lights provide brighter, whiter light output, use 80% less power (important for older alternators), last 30,000+ hours, and run cooler. However, LEDs cost more initially. Both options come in classic round designs that maintain the W900A's vintage appearance. Consider your electrical system capacity and whether you prioritize authentic styling or modern performance.

Are these lights DOT approved for on-road use, and what are the regulations?

Most driving lights we carry are DOT/SAE approved for on-road auxiliary lighting use. However, regulations vary by state regarding the number of forward-facing lights, mounting height, and when they can be used. Federal law allows auxiliary driving lights but typically requires them to be wired to turn off when you switch to low beams. Check your state's specific requirements, but generally, you're allowed 2-4 auxiliary lights mounted between 16-42 inches from the ground. We include DOT compliance information in each product listing.

What size driving lights look best on a W900A, and which finish matches the original chrome?

The most popular sizes for W900A driving lights are 5-inch and 7-inch round lights, which maintain proper proportions with the truck's classic styling. Many owners prefer the 5-inch size for a cleaner look, while 7-inch provides maximum light output. For finish, triple-chrome plated steel housings best match the original Kenworth chrome quality and hold up well against road salt and weather. Stainless steel is another excellent option that won't rust but has a slightly different appearance than chrome. Avoid plastic chrome-look housings as they tend to yellow and peel within 1-2 years.