
The Highlander horn fuse is located in the fuse box, which has three possible locations. The Type A and Type B fuse boxes are both in the engine compartment, with the Type A fuse box on the right side of the engine compartment and the Type B fuse box on the left. More details are as follows: 1. Both Type A and Type B fuse boxes can be opened by pressing the tab and then lifting the cover. The tool for removing the fuse is a clip fixed on the cover of the Type A fuse box. If any electrical component stops working, a fuse may have blown. 2. In such a case, inspect and replace the fuse if necessary. When performing , replace the fuse with one that has the same rated amperage as the original. If the replaced fuse blows again, contact a Toyota dealership to inspect the vehicle. 3. Never use a fuse with a higher amperage rating than specified or substitute any other item for a fuse. Always use genuine Toyota fuses or equivalent products. Never use a wire as a substitute for a fuse, even temporarily. Do not modify the fuse or fuse box.

As a long-time Highlander owner who has experienced sudden audio system failure, I once found the culprit to be a blown fuse. Located beneath the driver's seat at the junction between the steering wheel and door, you'll find a plastic cover with a pull handle when crouching down. The diagram attached to the inner side of the cover indicates each fuse's purpose - the audio system is usually labeled 'Radio' or 'Audio'. In my case, it was the blue 15-amp fuse numbered F34 that failed. Fortunately, I had a replacement on hand - remember to use plastic tweezers when handling to prevent electric shock. Later I realized it might have been caused by unstable current from my car charger. Without spare fuses, you can buy new ones for just a few dollars at auto parts stores. Always check if the thin wire inside the fuse link is broken.

Just last week, I helped my neighbor fix the no-sound issue with their Highlander's audio system—it turned out to be a blown fuse. The location is quite easy to find: just bend down from the driver's seat, and you'll see a black square box on the left side near your leg. Pull off the cover firmly, and you'll find the fuses arranged in a matrix pattern, with the audio fuse usually located in the middle section. There might be slight variations depending on the model year—mine is a 2018 model, and the fuse was in position F37. However, all models have a corresponding diagram on the inside of the cover. I recommend taking a photo of the original fuse's color and specifications with your for reference when buying a replacement. Always ensure the engine is off and the power is disconnected before working on it. If you notice any blackened or burnt marks, it indicates a short circuit, and you should take it to a professional auto repair shop for a thorough inspection of potential wiring aging issues.

Replacing the Highlander's audio fuse is actually quite simple. The fuse box is located in the hidden compartment above the driver's knee area. After removing the square cover, you'll find dozens of small blade fuses - locate the audio fuse slot using the diagram inside the box. Three key points: 1) Turn the key to LOCK position to cut power 2) Prepare replacement fuses with identical specifications 3) Check for oxide buildup on contacts that may cause poor connection. I once encountered a situation where a newly replaced fuse blew again, which turned out to be caused by a short circuit in the USB port affecting the audio circuit. Extra caution is needed if the vehicle has an aftermarket touchscreen installed, as non-OEM equipment with abnormal current may affect the fuse system. After replacement, remember to test if the radio and CD functions have properly resumed.


