This 31 LED turn signal is built for Peterbilt owners replacing or upgrading the signal lights on 379, 378, and 357 trucks. It uses forward, side, and rear-facing amber LEDs for improved signal visibility from multiple angles.
Features include:
- Fits 1987-2007 Peterbilt 379, 378, and 357
- 31 bright amber LEDs
- 21 forward-facing LEDs
- 4 side-facing LEDs
- 6 rear-facing LEDs
- Fits OE single 5×7 headlight housing
- Fits dual 4×6 headlight housing
- Amber or clear lens options
- 12V DC operation
- Simple 3-wire hookup
- DOT/SAE, FMVSS 108
- 10-year warranty
Key Features & Benefits
Multi-Direction LED Visibility
The light includes 21 forward, 4 side, and 6 rear-facing amber LEDs to help make the turn signal visible from more angles.
Peterbilt Headlight Housing Fitment
Designed to fit OE single 5×7 headlight housings and dual 4×6 headlight housings on compatible Peterbilt models.
3-Wire Hookup
The 12V DC wiring uses a simple 3-wire setup with .180″ bullet plugs.
Wiring color code:
- Green = ground
- Orange = high function
- Brown = low function
Compatibility & Use Case
Designed for:
- 1987-2007 Peterbilt 379
- 1987-2007 Peterbilt 378
- 1987-2007 Peterbilt 357
- OE single 5×7 headlight housing
- Dual 4×6 headlight housing
- Amber LED turn signal replacement
- Front signal light upgrades
- Custom Peterbilt headlight setups
Load resistors may be required for proper LED function. Suggested resistor items: #34205 or #34235.
Installation & Technical Details
- Product type: LED turn signal light
- LED count: 31
- LED color: Amber
- Lens options: Amber or clear
- Voltage: 12V DC
- Wiring: 3-wire hookup
- Plug style: .180″ bullet plugs
- Green wire: Ground
- Orange wire: High function
- Brown wire: Low function
- Installation style: OEM style
- Outer lens removal required: Yes
- Compliance: DOT/SAE, FMVSS 108
- Warranty: 10 years
Professional installation is recommended to confirm wiring, fitment, function, and whether load resistors are needed.
What’s Included
Included:
- 1 × 31 LED Turn Signal Light
Available options:
- Amber LED / Amber Lens
- Amber LED / Clear Lens
Recommended if needed:
- Load Resistor, item #34205
- Load Resistor, item #34235
Frequently Asked Questions About Peterbilt 31 LED Turn Signal Lights
What Peterbilt models does this fit?
This turn signal light fits 1987-2007 Peterbilt 379, 378, and 357 trucks.
What headlight housings does it fit?
It fits OE single 5×7 headlight housings and dual 4×6 headlight housings.
How many LEDs does it have?
It has 31 amber LEDs total: 21 forward-facing, 4 side-facing, and 6 rear-facing LEDs.
What lens colors are available?
The amber LED version is available with amber or clear lens options.
What wiring does it use?
It uses a 12V DC, 3-wire hookup with .180″ bullet plugs.
What is the wiring color code?
Green is ground, orange is high function, and brown is low function.
Does installation require removing the outer lens?
Yes. The supplied description states OEM-style installation requires removal of the outer lens.
Will this need load resistors?
Installation may require load resistors, item #34205 or #34235.
Is this DOT/SAE compliant?
Yes. The supplied product information lists DOT/SAE and FMVSS 108 compliance.
What warranty is included?
This product includes a 10-year warranty.
