Why Is My E-bike Motor Not Working?

Are you experiencing some issues with your e-bike motor?  This is usually related to one or more of the following issues: a dry solder joint, a loose connection, or a bad solder joint. 

This does NOT mean that you will have to reprogram the engine controller! There are other possible reasons your e-bike motor is not working. 

Read ahead to know more. 

The Battery Might Be Damaged.

If you have just bought the e-bike and it is not working, it might be due to a faulty battery. The first thing you should do is check if the battery is damaged. If it has any physical damage (such as cracks or holes), then replacing it will solve the problem.

If there are no signs of physical damage, the battery might still be faulty and must be checked. A faulty battery can be replaced with a new one.

The Throttle Might Be Broken.

The throttle is one of the most important parts of an electric bike. If it malfunctions, then you cannot ride the bike. The throttle controls how fast or slow you are going. Most electric bikes have spring-loaded throttles that can be moved up or down.

Some will have a trigger or button to press instead of a lever, but they still operate similarly. This type of throttle is common in most electric bicycles because it’s easy and cheap to implement, but if it breaks, you may need help to fix your bike.

  • Check the throttle cable. If it’s loose or broken, you must replace it.
  • Check the throttle lever and see if it has any cracks or bends. If so, this could be causing an issue with how far down you can pull on your lever before engaging the motorized bike’s power.

Try bending it back into place using pliers or another tool that won’t damage its plastic coating too much, while still allowing access to where these parts connect (such as inside a handlebar).

If this doesn’t work for whatever reason (perhaps because tools will need more space to access the parts), try looking up instructions online about best practices for fixing this problem–it might take some trial and error to find something effective!

The Controller Has Failed.

If your e-bike motor suddenly stops working, it could be because of a failure in the controller unit. This is one of the most common problems when using an electric bicycle or scooter. The controllers on these vehicles often fail due to overheating caused by a lack of airflow or poor maintenance practices.

When this happens, it will cause the motor to stop working altogether, or to only work at half power. If this happens while you are riding, you will lose control of your vehicle and fall off. In some cases, if your controller has failed, you might not even be able to start your e-bike anymore.

 If your controller is not working, it’s probably because of a short circuit. Any of the following can cause a short circuit:

  • A loose connection between wires or terminals on your e-bike motor
  • Broken wires in your electric bike motor system (this happens more often than you’d think)
  • Loose wire connections in general, including those at connectors and switches.

If this is happening to you, try removing all of your electrical and mechanical connections and reconnecting them one by one until the problem disappears. If not, then it’s time to get creative!

The Wiring Is Corroded or Damaged.

If you are having trouble with your e-bike motor, it could be due to several factors. The most common one is that water or oil has damaged or corroded the wiring.

To check if this is the case, look at all your wires carefully and see if any are broken or frayed. If so, you must re-solder them together using a soldering iron set up with new solder and cable ties (if needed).

If you hear a clicking noise when you try to start your bike, it might not be the battery but the wiring. A loose connection can cause this problem, usually due to corrosion from water damage. 

You can fix this issue by inspecting your wires and resoldering any loose ones. If this does not work, replace them with new wires and ensure they are securely connected to the battery terminals.

Suppose there isn’t any visible damage, but there’s still no power from either side of your battery connector when connected directly to an ebike battery pack.

In that case, chances are good that something has gone wrong internally within one or both connectors themselves – usually caused by poor quality materials used during the manufacturing process, which eventually leads them to fail over time, due to repeated flexing motions occurring when someone rides their bike around town every day!

The E-Bike Motor May Be Defective.

If there are no other issues with your e-bike, you may have a problem with the controller. The controller determines how much power is sent to the motor; if it’s defective, it can lead to problems with starting and efficiently stopping your bike.

To check if this is causing your problem, check if any lights are on or off on the display panel (usually near the handlebars) when trying to start your bike. If there are no lights when trying to start up, there may be something wrong with your controller, and you should contact an authorized dealer for assistance.

Pedal Assist System is Malfunctioning

Pedal assist systems are electronic motor drives that provide throttle activation and shifting of the motor according to the rider’s pedalling power. The system depends on a sensor that detects when you are pedalling, which triggers the motor to kick in.

In other words, you can ride your e-bike without assistance from the motor until you pedal past a certain level of resistance.

The pedal assist system is malfunctioning when it is not working as expected. Here are some common causes of this problem:

A loose connection between the sensor and controller:  The pedal assist system must be connected properly with both wires going into the controller. If these wires are loose or disconnected, the sensor will send no signal, preventing the motor from engaging.

A faulty sensor:  The pedal assist system uses a torque sensor that detects when you are pedalling at a certain resistance level. If this sensor breaks down, it won’t be able to tell if you need help or not while riding on an e-bike with an automatic transmission.

An incorrect wiring diagram:  You might have installed your pedal assist system incorrectly by following a wrong wiring diagram, or reading instructions improperly from an online guide or manual that only explains some components.

Low Battery Voltage

If your battery voltage is too low, this can cause problems with your motor. You should ensure your battery is charged and working properly before using the e-bike motor. Consider using a lithium-ion battery rather than a lead-acid one because it lasts longer and will not lose charge as fast.

The Brake Motor Inhibitor is not working properly

If your motor is not working, it might be due to the brake motor inhibitor. The brake motor inhibitor is a device that can cut off the power supply to your motor when you apply the brakes. It works by detecting the pressure applied on the brakes and then cutting off the power supply to the motor. This ensures that there is no back-driving of the bike when you brake.

A faulty brake motor inhibitor can cause your motor not to work. You can check this by disconnecting one of your batteries and seeing if it still runs. If so, there could be an issue with your brake motor inhibitor or wiring harnesses.


There are several possible reasons why your e-bike motor is not working.  The most common cause is a dead battery or faulty throttle.

If this happens to you, don’t panic! Check the connections and try charging them again. If that doesn’t work, then head over to your local shop, where they can help diagnose the problem for free, or at least point you in the right direction so that you can fix it yourself.

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