Shop Semi-Truck Turn Signal Lights

Keep your semi-truck safe on the road with reliable turn signal lights. Signal your intentions clearly to other drivers when changing lanes or making turns. Stay compliant with DOT regulations for a smooth ride. Regularly check and maintain your lights for a worry-free journey. Find the replacement Semi-Truck turn signal lights you need at 4 State Trucks!

Semi-Truck Turn Signal Lights Universal

Our semi truck turn signal lights are designed to boost visibility and enhance your rig’s safety. Whether you're replacing a cracked housing or upgrading to high-output LEDs, these lights help alert other drivers to your next move—lane changes, stops, or turns—clearly and reliably.

Turn Signal Lights for All Trucks

We carry universal turn signal lights that fit a wide range of commercial truck models, including Peterbilt, Kenworth, Freightliner, Mack, and Volvo. Perfect for: - Long-haul semi trucks. - Vocational work trucks. - Heavy-duty commercial vehicles. - Custom show rigs.

Why Upgrade to LED Turn Signal Lights?

Stock lights fade. LED upgrades shine brighter, last longer, and draw less power. Here’s what you’ll get: - High-output LED illumination that cuts through rain, fog, and night. - Amber and clear lens styles for a custom look. - Dual-function options that work as both turn signals and marker lights. - Fast response times that give other drivers quicker warning. - Plug-and-play universal fit for fast installs. These are some of the best turn signal lights on the road—designed to withstand vibration, harsh weather, and long hours behind the wheel.

Built for the Road Ahead

Every truck signal light in this category features: - Durable housings made to resist dust, water, and impact. - DOT-approved brightness and beam patterns. - Compact, low-profile designs that fit tight spots. - Long-lasting LEDs that keep your rig lit mile after mile. Pair them with commercial truck tail lights or upgrade your full lighting setup, including your truck's back-up lights and marker-clearance lights for greater visibilty all around.

Shop Turn Signal Lights at 4 State Trucks

Stay compliant. Stay visible. Stay in control. Whether you’re replacing worn-out lights or building a custom lighting system, our selection of semi truck turn signal lights makes it easy to find the right fit, finish, and function.

Frequently Asked Questions About Semi-Truck Turn Signal Lights Universal

Will these universal turn signal lights fit my specific truck model and year?

Universal turn signal lights are designed to fit most semi-trucks regardless of make, model, or year. However, you'll need to verify the mounting style matches your truck. Most universal lights use either stud-mount (single or double stud) or surface-mount configurations. Measure your existing mounting holes and compare them to the product specifications. Common mounting patterns include 2-inch, 2.5-inch, and 3-inch center-to-center spacing for double-stud mounts.

What's the difference between LED and incandescent turn signals, and which should I choose?

LED turn signals last significantly longer (50,000+ hours vs. 2,000 hours for incandescent) and use less power, reducing strain on your electrical system. They're also more resistant to vibration damage. However, LEDs may require a load equalizer or flasher relay upgrade to maintain proper flash rate, especially on older trucks. Incandescent bulbs are cheaper upfront and work with any electrical system but require more frequent replacement and draw more power.

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

Installation typically takes 15-30 minutes per light for someone with basic mechanical skills. You'll need a socket wrench set (usually 10mm-13mm), wire strippers, electrical connectors (butt connectors or heat shrink), and possibly a drill if you're changing mounting styles. Most universal lights come with color-coded wires: white for ground, amber/yellow for turn signal, and red for running lights if applicable. Always disconnect your battery before beginning electrical work.

Are these lights DOT approved and legal for highway use?

Look for lights that specifically state "DOT/SAE approved" or display the DOT marking on the lens. All turn signals sold for highway use must meet Federal Motor Vehicle Safety Standard 108 (FMVSS 108) requirements. This includes proper light output, color (amber for front and side markers), and visibility angles. Avoid lights labeled "off-road use only" as these won't pass DOT inspections and could result in citations.

What housing materials hold up best against weather and road conditions?

Polycarbonate housings offer the best durability for the price, resisting impacts, UV damage, and temperature extremes better than standard plastic. For maximum longevity, choose lights with stainless steel or chrome-plated die-cast aluminum bezels, which won't rust or corrode from road salt. Sealed units with rubber gaskets prevent moisture intrusion better than snap-together designs. In harsh winter climates, heated LED options prevent snow and ice buildup that can obscure the light.