2019 Ford F-150 Bulb Size Guide

Quick Reference Bulb Size Chart: 2019 Ford F-150

Note: Higher trim levels of the 2019 F-150 (Lariat, King Ranch, Platinum, Limited) came standard with OEM LED lighting systems for headlights, tail lights, and fog lights. These are sealed units and the individual "bulbs" cannot be replaced; the entire assembly must be changed if it fails. The table above primarily covers the more common halogen-equipped models (XL, XLT).

LED vs Halogen Upgrade Considerations

Upgrading your 2019 F-150's stock halogen bulbs to aftermarket LEDs is one of the most popular modifications owners make. LEDs offer a brighter, whiter light for improved visibility and a more modern look. However, it's not always a simple plug-and-play swap.

• CANBUS Errors: The F-150's computer monitoring system (CANBUS) expects to see a certain electrical resistance from the bulbs. Halogen bulbs have a different resistance than LEDs. When you install an LED, the system may think the bulb is burnt out, leading to a "bulb out" warning on your dash or "hyperflashing" (the turn signal blinking very rapidly). To fix this, you will need to install a "load resistor" or a "CANBUS-ready" LED bulb, which has a resistor built-in. This is most common for turn signal and brake light upgrades.
• Adapters and Fitment: For headlights and fog lights, ensure the LED replacement is designed to mimic the size and shape of the original halogen bulb (e.g., an H11 LED replacement). This ensures it fits correctly in the housing and aligns properly to create a clean, safe beam pattern that won't blind other drivers. Some cheaper LED kits may require bulky external drivers or fans that can be difficult to fit inside the headlight housing with the dust cover secured.
• Color Temperature: LED light color is measured in Kelvin (K). A 5000K-6000K rating will give you a bright, pure white light that closely matches the OEM LED look on higher trims. Anything above 6500K will start to look blue and can reduce usable light output.

How to Replace Each Bulb

Replacing bulbs on the 2019 F-150 is generally straightforward, requiring basic tools.

• Headlights (Halogen): Access is through the engine bay. Locate the back of the headlight assembly. The low beam (H11) and high beam (9005) are covered by round plastic dust covers. Twist the cover off, then twist the bulb's socket to remove it. Unclip the wire harness, replace the bulb, and re-install. Never touch the glass of a new halogen bulb with your bare hands, as oils from your skin can cause it to fail prematurely.
• Fog Lights: Access is usually from underneath the front bumper or by removing a small panel in the front wheel well liner. The 9145 bulb twists out of its socket similar to the headlights.
• Tail Lights, Brake, & Turn Signals (Rear): Lower the tailgate. You will see two bolts (typically 8mm) on the inside edge of the truck bed holding the tail light assembly in place. Remove these bolts, and carefully pull the entire housing straight back (not to the side) to release the clips holding it to the truck body. Twist the sockets to access the 3157 bulbs.
• Front Turn Signal/DRL: This is the most difficult bulb to access. It is located deep within the headlight assembly. While it can sometimes be reached from the engine bay, it is often easier to partially remove the front wheel well liner to get a better angle from behind.
• License Plate Lights: These are very simple. The housings are located on either side of the license plate on the rear bumper. Squeeze the clips on the housing and pull it down. The T10 bulb pulls straight out of the socket.
• Interior Dome/Map Lights: Use a plastic trim removal tool to gently pry the clear lens off the overhead console. The 194/T10 bulb can then be pulled straight out.

Common Lighting Issues for this Generation F-150 (2015-2020)

The 2015-2020 generation F-150 is quite reliable in its lighting systems, but a few common issues can arise.

• Condensation in Headlight/Tail light Housings: Some owners report moisture building up inside the light assemblies, particularly after heavy rain or car washes. While minor fogging that clears up is normal, persistent water droplets could indicate a bad seal on the housing itself.
• Hyperflashing After LED Upgrades: As mentioned, this is the most common issue and is almost always caused by the CANBUS system not recognizing the low-resistance LED bulb. Installing load resistors across the turn signal wires is the standard fix.
• OEM LED Failures: On Lariat and higher trims, while the OEM LED systems are designed to last the life of the vehicle, failures can happen. A flickering or dead headlight, tail light, or "signature lighting" accent often requires the replacement of the entire expensive assembly, as the individual diodes are not serviceable.

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