International S1700-S1900 Lights

Frequently Asked Questions About International S1700-S1900 Lights

Will these lights fit my specific International S-Series truck model and year?

Our International S1700-S1900 lights are designed to fit S-Series trucks manufactured from 1979 through 2001. This includes all S1700, S1800, and S1900 models within that production range. However, minor variations exist between early models (1979-1989) and later models (1990-2001), particularly in mounting bracket configurations. We recommend checking your existing light measurements and comparing them to our product specifications, or contacting our support team with your OEM for exact fitment confirmation.

What's the difference between OEM replacement and aftermarket LED upgrade options?

OEM replacement lights use traditional sealed beam or halogen bulbs that match your truck's original specifications, typically drawing 55-65 watts per light. LED upgrades offer 3-5 times more brightness while using only 20-30 watts, reducing strain on your electrical system. LED options also last 30,000-50,000 hours compared to 500-1,000 hours for standard bulbs. While LED upgrades cost more initially, they eliminate frequent bulb replacements and provide better visibility, especially important for work trucks operating in low-light conditions.

Do I need any special tools or modifications to install these lights?

Most direct replacement lights install using basic hand tools - typically a Phillips screwdriver, 10mm and 13mm sockets, and wire crimpers for any connector replacements. Installation usually takes 30-45 minutes per light. LED upgrades may require additional wiring adapters or load resistors to prevent hyperflashing on turn signals. Some 1979-1989 models might need minor bracket adjustments due to mounting point variations. We include detailed instructions with each product and offer phone support if you encounter any installation challenges.

Are these lights DOT approved and legal for highway use?

All lights in our International S-Series category that are intended for on-road use carry DOT certification markings and meet FMVSS 108 standards for commercial vehicles. Each product page clearly indicates DOT compliance status. Some auxiliary LED light bars and work lights are marked "off-road use only" and should not be used on public highways. When selecting lights, look for the DOT marking information in the product specifications to ensure compliance with your state's commercial vehicle regulations.

How do these aftermarket lights compare to OEM quality in terms of durability?

Our aftermarket lights are manufactured to meet or exceed OEM specifications for the S-Series trucks. The housings use heavy-duty polycarbonate lenses that resist cracking and yellowing better than original equipment from the 1980s and 1990s. Sealed units feature improved gaskets and moisture barriers compared to original designs. Based on customer feedback, these lights typically last 5-7 years in commercial use conditions, with LED options lasting significantly longer. All lights carry a minimum 1-year warranty, with some LED models offering 3-year coverage.