Frequently Asked Questions About Mack RD Truck Lights
What year models of Mack RD trucks are these lights compatible with?
Our Mack RD truck lights are designed to fit RD series trucks from 1990 to 2004. This includes RD600, RD688, and RD690 models. Always verify your specific year and model before ordering, as slight variations may exist between early and late production runs. If you have a 2005 or newer Mack, you'll need to check our Granite series lighting options instead.
Are these lights DOT approved and street legal?
Yes, all our Mack RD replacement lights meet or exceed DOT FMVSS 108 standards and SAE specifications. Each light comes with proper certification markings. Our LED options are also compliant with current regulations. However, some aftermarket accent lighting or color options may be for off-road use only - these will be clearly marked in the product description.
How difficult is the installation process, and what tools do I need?
Most Mack RD lights are direct bolt-on replacements requiring basic hand tools - typically a socket set, wire strippers, and electrical connectors. Headlight installation takes about 30-45 minutes per side. Marker lights average 10-15 minutes each. The main challenge drivers report is accessing the back of the headlight housing on some models, which may require removing the inner fender liner. We recommend having dielectric grease and heat shrink connectors on hand for weatherproof connections.
What's the difference between OEM-style and LED upgrade options?
OEM-style lights use traditional halogen bulbs and match factory specifications exactly, typically costing less upfront. LED upgrades offer 50,000+ hour lifespan compared to 1,000-2,000 hours for halogen, draw less power, and provide brighter, whiter light output. LEDs cost more initially but eliminate frequent bulb changes. Both styles fit the same mounting points, but LED units may require different connectors or resistors to prevent hyperflashing on turn signals.
Will aftermarket lights affect my truck's resale value or warranty?
Quality DOT-approved replacement lights typically don't impact resale value negatively, especially if you keep the original lights. Many buyers actually prefer trucks with LED upgrades. For trucks still under warranty, replacing lights with DOT-approved units shouldn't void coverage, but always check your specific warranty terms. We recommend keeping all original parts and documentation. Professional installation receipts can also help demonstrate proper maintenance to future buyers.
