Which Wire is the Speed Limiter?

2 Answers
LeTaylor
09/03/25 3:05am
There are usually two wires connected together on an electric vehicle controller, typically black or gray in color. These two wires are the speed limiter wires. Disconnecting them will remove the speed limit, but for safety reasons, this should be done with caution. Removing the speed limiter will significantly increase the maximum speed of the electric vehicle. Below is some relevant information about electric vehicles: 1. Introduction to Electric Vehicles: Electric vehicles, also known as electric-powered vehicles or e-vehicles. 2. Classification of Electric Vehicles: Electric vehicles can be categorized by the number of tires and structural type into: electric bicycles, electric motorcycles, electric unicycles, electric four-wheelers, electric tricycles, and electric scooters. 3. Charging Costs: (Fast Charging) The installation requirements and costs for fast charging equipment are very high. Fast charging involves higher current and voltage, which can cause significant stress on the battery in a short time, leading to the shedding of active materials and battery overheating. No matter how perfect the battery is, long-term fast charging will ultimately affect its lifespan.
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VanColin
09/15/25 4:48am
I've worked in the automotive industry for many years and often encounter such questions. Actually, there's no specific cable called a 'speed limiter wire'. You're probably referring to the wiring connected to the vehicle speed sensor. This set of wiring harness usually extends from the transmission or wheel bearing position and connects to the ECU and dashboard. The location varies significantly between different car models. Japanese cars often hide it in the lower right of the engine compartment, while German cars typically place it on the side of the transmission. For front-wheel-drive cars, it's mostly near the wheel hub, and for four-wheel-drive cars, it's present on both front and rear wheels. The cable colors aren't standardized either - Volkswagen commonly uses blue and white wires, while Toyota prefers gray and red. I'd advise against attempting to remove it yourself, as it's easy to accidentally touch the ABS sensor wires. Last week, a customer forcibly pulled the wrong wire and ended up triggering the engine warning light, costing over 800 in repairs.
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