Upgrading your truck’s front lighting is one of the easiest ways to modernize its appearance. In this guide, we show you exactly how to install LED turn signal bulbs on a 2007 to 2013 Toyota Tundra. Follow along as we replace the factory amber parking and turn signals with LED bulbs. We will also install a durable side marker bulb and anti hyper flash resistors for proper operation. We tested this setup on our own truck and installed every part ourselves. That means we’ve already worked through the small details, so you can complete the upgrade with confidence.
What Bulbs We Used and Why They Matter
For the front side markers in the headlight we used the 1 watt ceramic style 194 bulbs from GTR Lighting. For the front parking lights and turn signal bulbs we used the special CK-style 3157 LED bulbs, plus 50 watt load equalizing resistors from GTR Lighting. These three parts work together as a complete package, and if you want to look at the full range of options we recommend browsing our selection of Tundra LED parking light bulbs before you start.
The reason we chose the ceramic 194 bulbs for the side markers is durability. We do not recommend using 194 bulbs with exposed circuit boards in exterior housings because they typically do not last very long. These ceramic 194 bulbs are built to handle the elements. Their waterproof design and durable construction make them an excellent long term choice for exterior marker lights.
The CK-style 3157 LED bulb from GTR Lighting uses 24 individual 50/50 SMD LED chips. This is the critical part to get right. You cannot just use any old 3157 bulb, it has to be a CK-style. This is very, very important. If you put a regular non CK-style 3157 bulb in your socket, you are probably going to blow a fuse. The Tundra uses a specific wiring configuration that requires CK style bulbs. Standard 3157 LED bulbs will not work correctly. If you want the technical details, our CK style 3157 LED bulb guide explains everything you need to know.
Tools You Will Need
Before we get into the removal steps, gather your tools. To complete this job, you will need a few basic tools. Grab a flathead screwdriver, 10mm socket, and ratchet. You will also need a wire stripper, soldering iron, solder, electrical tape, and a drill with a Phillips bit. Having these tools ready before starting will make the process much smoother. This is the exact kit we used for this Tundra turn signal LED upgrade.
How To Remove the Tundra Headlight
Step 1: Remove the Lower Trim Panel
First thing is to get the hood out of the way. To access the headlight, remove the trim panel below it. Two plastic clips hold the panel in place. You will also need to remove two top bolts and additional bottom bolts. Start by removing that plastic trim panel from underneath the headlight. To get the plastic clips off, we recommend using a flathead screwdriver and just prying them out.
With the clips removed, the panel is loose but still held in place by two plastic pins that go into the fender. Keep using your flathead screwdriver, but be very, very careful not to scratch this edge. If you are worried at all that you might scratch it, we recommend putting some protective paint down there. There is one pin on the top and one on the bottom, so go slow. Once you get them loose, they should slide right out.
Step 2: Remove the Bolts and Release the Top Hooks
Once the trim panel is gone, the lower 10mm bolt is exposed. Remove the one on the bottom and the two on the top. Once those are out, the last thing holding the headlight in place, besides the pressure of everything sitting there, is a little lip that the housing falls onto. Pry this part up a little bit and make sure the hooks on top release. Then the whole thing should come straight out.
We actually removed the entire headlight because it makes the job a lot easier. One thing to be careful of when doing this is to make sure the bottom of the headlight does not touch the paint, because it will scratch. Keep your hand down there to protect the finish while you work.
Installing the LED Bulbs
Step 3: Swap the Side Marker Bulb
With the headlight out, pull out the amber turn signal and parking light and set it aside, then the amber side marker light, along with the high beam, low beam, and one last plug for the motorized adjustment. We did the side marker light first. Take one of the GTR Lighting ceramic 1 watt 194 bulbs and replace the original 194. That is all there is to it. This platform, along with other builds we have done on the Toyota Tundra, benefits from the toughness of these ceramic bulbs.
Step 4: Install the CK-Style 3157 LED Bulb
Next we used the CK-style 3157 LED bulb from GTR Lighting. Put it in, and if it turns on you are good. If you get it in backwards, just flip it around. If this was a standard bulb it might smoke the bulb or pop a fuse, so again, the CK-style is the only correct choice here.
Fixing the Hyper Flash Issue
Just by installing the LED bulbs, we ran into an issue called hyper flash, where the vehicle’s computer thinks there is a bulb out because we are using a low wattage LED instead of a standard incandescent bulb. When we tried to turn the blinkers on, we got a fast flash issue.
The way to fix that is by installing a load equalizing resistor. What it does is mimic the properties of the original bulb and trick the truck’s computer into thinking that the factory bulb is both still installed and working correctly. We wired it in parallel between the white wire, which is the ground, and the pink wire, which is the positive flashing wire.
This may be different from year to year on different Tundras, so make sure that either you hire a professional installer to figure this out or measure the wires yourself to confirm which one is ground, which one is positive parking light, and which one is positive blinker. First, expose some wiring by pulling the loom back and out of the way. Use your wire strippers to expose the bare wire on the white ground wire and the pink positive wire. Take one end of the load equalizing resistor and wrap it around the bare ground wire, then take the other end and wrap it around the pink positive wire. It is wired in parallel, and it does not matter which side of the resistor goes to positive and which goes to negative.
Step 5: Solder and Tape the Connections
This kit comes with scotch locks, and you can use those if you want, but we prefer to never use them. Anytime we get a product with scotch locks or tabs, we usually just throw them in the garbage and solder the connections, and we advise you to do the same. Once you have bare soldered connections, tape them up so they are safe. Make sure you get enough tape to both cover the connection and ensure that if it rubs against something it will not wear through.
Step 6: Mount the Resistor to Metal
The last step with the resistor is to mount it to some kind of metal. You would not think it by looking at it, but this golden resistor gets to be almost 220 degrees Fahrenheit, so if you put it on anything fibrous or plastic it is going to cause a problem. We mounted it to a piece of sheet metal down below the headlight where there is nothing that can be damaged on the other side. Using a little self-tapping screw, we went through one of the mounting tabs and attached it as low as we could get it. Then we were ready to reassemble all the wiring.
The Final Fit Test and Results
The last step is a final fit test. Make sure all your wiring is safe and not being pinched, then turn the lights on and see how they look. This is one of the only LED bulbs that works as a plug and play option for this housing. There are others out there, but these work really well on the Tundra.
Something we like about this setup is the color difference from stock. It is a little bit of a lighter color as opposed to the dark orange color it comes with from the factory. Because of all the different LED chips that illuminate on the bulb, you can see that pattern inside the reflector, with many dots in there, and it is a cool look. It does not glow like the factory bulb does, it is an instant on, instant off type of activation.
The side parking light looks pretty good too. It does not really look much different than stock, but it should be brighter, and it is never going to burn out on you, which is a real advantage. One of our biggest pet peeves with big headlights like this is when there is no amber lens but the bulb is amber, so when it is off you can still see the glow of amber inside the housing. When you install these LEDs you do not see anything, it is totally white, like there is nothing there until it turns on. The GTR Lighting LED bulbs have a black plastic base, so when you put them in they all but disappear.
Once everything is installed, reinstall the three bolts to secure the headlight. Then reinstall the front trim piece and repeat the process on the other side. In our comparison, GTR Lighting LED bulbs were installed on the passenger side. The stock bulbs remained on the driver side. The color difference and instant on/off response are easy to see. These LEDs should also outlast the factory incandescent
Frequently Asked Questions
What bulbs are used for the Tundra’s front turn signal and parking lights?
The video uses GTR Lighting CK-style 3157 LED bulbs for the amber parking and turn signal function, and GTR Lighting 1 watt ceramic 194 bulbs for the front side marker lights.
Why does the CK-style 3157 bulb matter instead of a standard 3157 LED?
The Tundra uses a specific wiring setup, and installing a non CK-style 3157 bulb can blow a fuse or damage the bulb, so the CK-style bulb is required for correct operation.
What is hyper flash and why does it happen after installing LED bulbs?
Hyper flash is a fast blinking issue that occurs because the low wattage LED bulb draws less power than the factory incandescent bulb, causing the truck’s computer to think a bulb is out.
How do you fix hyper flash on the Tundra after installing LED turn signal bulbs?
Install a load equalizing resistor in parallel between the white ground wire and pink turn signal wire. This mimics the factory bulb’s electrical load, allowing the computer to detect proper operation.
How hot does the load equalizing resistor get, and how should it be mounted?
The resistor can reach nearly 220 degrees Fahrenheit during operation. Mount it to metal, like the sheet metal below the headlight. Do not attach it to plastic or fibrous materials.
Meet the Experts Behind Headlight Revolution
Chris Nelson – Founder</strong>
Before founding Headlight Revolution in 2011, Chris worked as an automotive install technician specializing in lighting, sound systems, and engine performance parts. He has personally tested thousands of lighting products and works directly with lighting engineers to evaluate the technical performance behind every recommendation.
Josh Beberg – Content Production Manager
Josh leads hands-on testing and content production at Headlight Revolution. From beam pattern comparisons to real-world installations, he works directly with lighting engineers to ensure every review is grounded in measured results, not marketing specs.
