Frequently Asked Questions About Hino 238-338 Truck Cab Lights

Will these cab lights fit my specific Hino 238 or 338 model year?

Most aftermarket cab lights for Hino 238 and 338 trucks are designed to fit models from 2005 to 2018. However, there can be slight variations in mounting hole patterns between early models (2005-2010) and later models (2011-2018). Always verify the exact measurements and mounting specifications before ordering. If you're unsure, contact our support team with your truck's VIN or year/model for confirmation.

How difficult is the installation process, and what tools do I need?

Installation typically takes 2-3 hours for someone with basic mechanical skills. You'll need a drill with metal bits (usually 3/8" and 1/2"), a center punch, masking tape, wire strippers, electrical connectors, and silicone sealant. The most challenging part is drilling through the cab roof - take your time marking hole locations accurately. Most kits include templates, but double-check alignment before drilling. Professional installation runs $150-300 if you prefer not to DIY.

Are these cab lights DOT compliant and legal in all states?

Quality aftermarket cab lights should be DOT approved and stamped with the appropriate certification. Federal regulations require amber lights for vehicles over 80 inches wide. However, some states have additional requirements regarding light placement and intensity. California, for example, has stricter regulations. Check your state's commercial vehicle lighting requirements before installation to ensure compliance.

What's the difference between LED and incandescent options for durability?

LED cab lights typically last 50,000+ hours compared to 2,000-5,000 hours for incandescent bulbs. LEDs also draw less power (about 80% less), generate minimal heat, and are more resistant to vibration damage. While LED options cost 20-40% more upfront, they eliminate frequent bulb replacements and reduce electrical system strain. Most Hino operators report LED lights lasting 5-7 years of heavy use versus replacing incandescent bulbs every 6-12 months.

How do I properly seal the lights to prevent water leaks?

Proper sealing is critical to prevent cab leaks. Use a high-quality silicone sealant (not standard caulk) rated for automotive use. Apply sealant to both the light base gasket and around drilled holes before mounting. Create a continuous bead with no gaps. After installation, test with a garden hose before hitting the road. Many installers also recommend adding a secondary bead of sealant around the light base after mounting for extra protection. Recheck and reseal annually as part of routine maintenance.