Frequently Asked Questions About Freightliner Cascadia 113/125 Cab Lights

Will these cab lights fit my specific year model Cascadia?

Our cab lights are designed to fit Freightliner Cascadia 113 and 125 models from 2008 to 2017. The 2018+ New Generation Cascadia uses a different mounting system and requires model-specific lights. Always verify your truck's build year before ordering, as mid-year production changes can affect compatibility. If you're unsure, check your VIN or contact us with your truck details.

What's involved in the installation process, and do I need special tools?

Installation typically takes 2-4 hours depending on your experience level. You'll need basic hand tools, a drill with metal bits, wire strippers, and electrical connectors. Most installations require drilling five holes in the cab roof for standard 5-light setups. We recommend using a center punch to prevent drill walking, applying rust-preventive primer to drilled holes, and sealing with quality silicone. Professional installation runs $200-400 if you prefer not to drill into your cab.

What's the difference between LED and incandescent options?

LED cab lights draw 80% less power, last up to 50,000 hours compared to 2,000 hours for incandescent, and provide instant-on brightness. They're more resistant to vibration and generate minimal heat. Incandescent lights cost less upfront but require frequent bulb replacements. Most drivers find LED lights pay for themselves within 18 months through reduced maintenance and better visibility in all weather conditions.

How do I ensure the lights are DOT compliant for my application?

All cab lights we carry meet FMVSS 108 requirements for clearance and identification lamps. For trucks over 80 inches wide, amber lights are required by DOT regulations. The lights must be mounted at the highest practical point on the front of the vehicle. Each light should include proper reflectors and maintain specific photometric patterns. Our DOT-approved options are clearly marked in product descriptions.

What about wiring - can I connect these to my existing cab light wiring?

If your Cascadia came pre-wired for cab lights from the factory, you can typically use the existing harness located behind the headliner. For trucks without factory wiring, you'll need to run new wiring from the lights to your clearance light circuit or add a dedicated switch. We offer plug-and-play harness kits that simplify this process. Always use properly rated wire (typically 16-18 AWG) and protect connections from moisture with heat-shrink tubing or weatherproof connectors.