7440/7443 White CANBUS LED With Built-in Resistors No Error Codes (PAIR)
7440/7443 White CANBUS LED With Built-in Resistors No Error Codes (PAIR) is backordered and will ship as soon as it is back in stock.
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7440/7443 White CANBUS LED Bulbs | 300% Brighter | No Hyperflash
Underground Lighting 7440 and 7443 LED bulbs are designed for compatible vehicles using 7440 or 7443 sockets. The CANBUS-compatible electrical design with a built-in resistor allows the turn signal bulb to operate normally without any signs of hyperflash.
The resistor is installed only on the turn signal filament. It is not placed across both filaments. This reduces unnecessary heat during normal operation. A built-in cooling fan activates when the turn signal is operating, while the full metal construction helps move heat away from the bulb.
The design is also nonpolar and CANBUS compatible. This gives the bulb flexibility across different socket configurations without extra wiring or modification.
CANBUS LED With Built-in Resistor
Replacing turn signal 7440/7443 halogen lights with LEDs can cause the turn signal bulb to flash too fast. This is because LEDs draw significantly less current than halogen lights. This load difference creates flickering and warning messages on the vehicle's dashboard.
Our 7443 CANBUS LED bulb uses an integrated resistor for the turn signal circuit. This eliminates flickering and error messages without needing an external load resistor.
The CANBUS design, nonpolar operation, and CK compatibility are built in. The cooling system is also designed around the resistor, with the fan activating when the turn signal is operating.
Bright White LED Output for Exterior Lighting
The white LED design is suited to applications where a white replacement is required, including reverse lights, parking lights, daytime running lights, and compatible turn-signal applications.
Each bulb uses 54 SMD LEDs arranged around the bulb to distribute light through a 360-degree pattern. Compared to halogen, which only delivers 300 to 400 lumens per bulb, ours delivers 1200 lumens per bulb, giving the factory housing a stronger white LED source than the original incandescent bulb.
Designed Around the 7440/7443 Application
The 7440/7443 bulb family is used across a range of vehicle lighting applications, including reverse, parking, daytime running, and turn signal positions. The correct bulb depends on the socket and lighting function used by your vehicle.
This replacement is built for both 7440 and 7443 applications, making it suitable for vehicles that use either bulb number. Check your factory bulb number before ordering to confirm the correct application for your vehicle.
Installation
Difficulty Level: Beginner - Simple Installation for anyone.
Installation takes approximately 10 minutes. The bulb installs as a plug-and-play replacement with no slicing, complicated wiring, or external resistors required.
Works for 99.9% of vehicles.
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Do you have any questions about the application, installation, shipping, warranty, or more? Do not hesitate to reach out to Underground Lighting and talk to a specialist. Chat with us online by hitting the chat button or call us at (561) 918-5225. We are here to help!


