Jamarco LED Turn Signal Marker Lights for Peterbilt — 2-Pack Amber Rectangular Direct-Fit, 31-LED Sealed Units

These Jamarco 2-pack amber LED assemblies replace Peterbilt rectangular headlight turn signals, providing bright, multi-mode marker and turn indication in a sealed unit.

Built for heavy-duty Peterbilt trucks, this pair of amber LED marker/turn signal lights is a direct-fit replacement for many rectangular headlight assemblies. Each sealed unit contains 31 LEDs and arrives hardwired with three pigtail wires for simple integration into your existing harness. Stainless steel screws are included so you can secure each light without hunting for extra hardware.

How do these LED turn signals connect to my truck?

Each lamp is supplied with three pigtail wires to match common wiring configurations. The color-coded wires make it straightforward to tie into your truck’s ground, turn signal, and parking circuits.

• White wire: chassis ground connection.
• Red wire: turn-signal input, activates front 21 LEDs (high mode) and rear 6 LEDs.
• Black wire: park/running/marker light input, activates front 21 LEDs (low mode) and side 4 LEDs.

Will these fit my Peterbilt model?

These assemblies are designed to replace the bulb-and-lens portion of dual rectangular headlight setups and fit many Peterbilt models. They are sold as right- or left-hand units and are compatible with a wide range of legacy Peterbilt trucks.

• Compatible with Peterbilt 357, 359, 365, 378, and 379 series models.
• Works as a direct replacement for rectangular headlight turn marker lights.
• Sold in a 2-piece set to cover both sides of the vehicle.

What light modes and visibility can I expect?

The internal LED arrangement provides distinct brightness levels for turn and parking functions, improving visibility without additional bulbs. Diodes are oriented for broad side and forward illumination to make signals more noticeable to other drivers.

• 31-LED layout: 21 LEDs for primary illumination, 6 rear-facing for turn cueing, and 4 side LEDs for marker visibility.
• Separate high/low illumination behavior for clear turn versus parking signals.
• Sealed housing protects LEDs from road moisture and debris.

How difficult is installation and what hardware is included?

Installation is intended to be quick for technicians familiar with headlight assemblies. Use the included stainless steel screws and your factory mounting points to secure each unit, wiring the pigtails into the matching harness circuits.

• Includes stainless steel mounting screws for immediate installation.
• Hardwired three-wire pigtails for plug-in wiring to existing circuits.
• Plug-and-play replacement of bulb-and-lens sections—no need to modify the headlight housing.

Who is this for? Truck owners and fleet maintenance teams running Peterbilt models with dual rectangular headlights who want a robust, sealed LED replacement for amber turn and marker lights. This 2-piece Jamarco kit suits professionals seeking straightforward wiring, improved visibility, and a durable sealed lamp that matches common Peterbilt configurations. If you maintain older Peterbilt trucks and want a reliable modern LED upgrade without changing the headlight assembly, this set provides a practical, bolt-in solution.