The alternator charges the battery and powers various electrical systems, making it vital to semi-trucks that operate for long hours so that drivers can meet deadlines. However, if this component fails, you cannot drive the vehicle at all, requiring truck repairs to get you back on the road. Here are some common indications that you are experiencing this problem so that you can receive prompt attention.

What Happens When an Alternator Is Failing? 

1. Difficulty Starting 

For your semi-truck to turn on, the alternator must charge the battery so that it can engage the starter. As this process occurs, the starter rotates and turns the engine, allowing it to use gas for operation. However, if the alternator fails to create enough energy, the truck won’t have sufficient power to rotate the starter. This commonly happens when debris obstructs the alternator or allows corrosion to form, blocking the electrical path.

2. Flickering Lights

One of the first signs of issues with an alternator is when your headlights, interior lights, and radio system stop working. These devices may turn on and off suddenly or the lights may appear dimmer than normal. This happens when the alternator cannot provide enough power to your peripheral systems while also charging the battery. Without prompt truck repairs, these electrical components must rely on the battery, which will quickly die.

3. Warning Light

The truck’s dashboard will have an indicator that warns you when the alternator isn’t working properly. While this usually takes the shape of a battery, it may also appear as “ALT” or “GEN,” to differentiate the warning. Even if there are no other indications of an alternator problem, you shouldn’t ignore the light. Scheduling an appointment with a truck repair specialist will help you avoid a breakdown and further issues.

If you have a faulty alternator or any other problem with your semi-truck, turn to Stephenson Truck Repair in Lincoln, NE. This family-owned and -operated company has been in business since 1966, and they have a mechanic shop and a body shop in the same location. They repair everything from motor homes and trailers to buses and farm equipment. Call (402) 466-8532 to schedule an appointment, or visit their website for more information about their services.