Where is the Vios fog light relay located?
4 Answers
Vios fog light relay is located inside the fuse box in the engine compartment. The relay, also known as an electrical relay, is an electronic control device that consists of a control system and a controlled system. It is commonly used in automatic control circuits, essentially functioning as an automatic switch that uses a smaller current to control a larger one. The Vios is an entry-level family car specifically designed and developed by Toyota for the Asian market. Based on the NBC platform with an extended wheelbase, the Vios developed on this compact car platform nearly reaches the level of a compact sedan. The dimensions of this car are 4420mm in length, 1700mm in width, 1490mm in height, with a wheelbase of 2550mm.
Last time I helped a friend fix the Vios fog light issue, I located the relay position. It's inside the fuse box in the engine compartment, usually near the battery or headlight assembly. You'll need to pop the hood and look for a small black box labeled 'FOG LAMP RELAY' with stickers or symbols. The location may vary slightly by model year - for instance, the 2015 version is on the right side while the 2018 model has it relocated. Always check the owner's manual first to avoid electrical hazards. If the relay fails, the fog lights won't work. When replacing it yourself, opt for genuine parts for better durability. I've seen many cases where oxidized relay contacts caused circuit shorting - extra caution is needed. Always disconnect the negative terminal before inspection for safety, and keep tools dry to prevent accidents. If you can't locate it, check online forum diagrams or visit the dealership directly.
As a long-time Vios owner, I personally confirmed that the fog light relay is hidden behind the instrument panel side cover under the steering wheel. Bend down from the driver's seat and look underneath – you'll find a plastic cover that opens to reveal the fuse box. The relay is usually labeled 'FOG', a small square box that's easy to pull out. My 2010 Vios had it there, and replacing it immediately fixed the light. While the location has minimal changes, newer models might have upgraded to the engine bay. When wiring diagrams provide no clues, check car forums for DIY visual guides – it saves time and hassle. Safety reminder: Always turn off the engine before handling relays to avoid blowing fuses. During routine maintenance, clean the contact points to prevent moisture-related malfunctions. If your fog lights flicker or cut out, it's likely a sign of relay aging requiring replacement.
A faulty relay control circuit switch for the Vios fog lights may cause the lights not to illuminate. The standard location is inside the engine compartment fuse box, near the firewall. Look for a small rectangular black box labeled 'FOG RELAY' and pull it out directly. Function test: Remove it and check if the contacts are burnt. There are significant differences between old and new models; after 2012, it is located in a small slot under the lower left side of the dashboard. Manual replacement is simple—just buy an adapter model for plug-and-play. Always confirm the fixed location by checking the manual to avoid mistakenly removing related components.
