Your e-bike won't charge. The display is dead. Or maybe it's cutting out mid-ride when you need it most. If you own a direct-to-consumer e-bike: like Rad Power, Lectric, Aventon, or Juiced: you've probably discovered that most local bike shops won't touch the electronic components. They'll work on your chain and brakes, but when it comes to battery and electrical diagnostics? You're on your own.

That's where we come in. At Puget Sound Technologies, we specialize in diagnosing and repairing the electronic heart of your e-bike: the battery, charger, and all the systems that keep you rolling.

What We Test and Why It Matters

E-bike electrical problems aren't always obvious. A battery that won't charge could have a dead charger, blown fuse, failed BMS (Battery Management System), or individual cell issues. Without proper diagnostic equipment, you're just guessing: and replacement parts for these systems can cost hundreds of dollars.

Our comprehensive diagnostic service tests every critical component in your e-bike's power system:

Battery Voltage Testing: We measure voltage at multiple points: the battery terminals, charging port, and discharge connections: to pinpoint exactly where power is lost. A healthy 48V battery should read around 54.6V when fully charged, but we also test under load conditions to reveal problems that only show up when you're actually riding.

Individual Cell Group Analysis: Your e-bike battery contains multiple cell groups that should stay balanced. When one group starts failing, it affects the entire pack's performance. We access the balance leads on your BMS to test each cell group individually, identifying weak or failing sections before they damage the rest of your battery.

Charger Output Verification: A faulty charger can damage your battery or simply refuse to charge it. We test your charger's output voltage and current to ensure it's delivering the right power levels. Many charging issues that seem like battery problems are actually charger failures.

BMS Functionality Check: The Battery Management System is your battery's brain, controlling charging, discharging, and protecting against overheating or overcharging. We test the BMS for proper balancing, accurate voltage monitoring, and communication with your e-bike's controller.

Our Professional Diagnostic Process

When you bring your e-bike to us, we start with a systematic approach that most repair shops can't match. We use professional-grade multimeters, battery analyzers, and specialized e-bike diagnostic tools: not just basic voltage checks.

First, we perform a complete visual inspection, checking for physical damage, corrosion, loose connections, and worn components. Many electrical problems start with simple mechanical issues that compound over time.

Next comes the electrical testing phase. We measure voltages throughout your system while simulating real-world conditions. This means testing your battery under load, checking how your charger responds to different charge states, and verifying that your BMS is protecting and balancing your cells properly.

We also inspect and test all fuses in your system. E-bikes use various fuses to protect different circuits: main battery fuses, charger fuses, and controller fuses. A blown fuse is often the first sign of an underlying electrical problem, and we check each one systematically.

Jump Starting Dead BMS Systems

Here's where our service really shines: BMS recovery. Sometimes an e-bike battery's BMS goes into protective shutdown mode and won't "wake up" even with a good charger connected. This typically happens when a battery is stored discharged for too long, or after a fault condition triggers the BMS protection.

Many shops would tell you to replace the entire battery pack: a $400-800 expense. But often, we can "jump start" the BMS back to life using specialized techniques and equipment.

The process involves carefully applying controlled voltage to specific points in the BMS circuit to reset its protective state. It's delicate work that requires understanding each BMS type and its specific requirements. Done incorrectly, you can permanently damage the system. Done right, your "dead" battery comes back to life and functions normally.

This service has saved our customers thousands of dollars in unnecessary battery replacements. We've successfully recovered batteries from every major direct-to-consumer brand, including systems that other shops had declared "unfixable."

Fuse Replacement: No Extra Charge for Small Parts

When we find blown fuses during diagnostics, we replace them at no additional charge for the parts. Whether it's a main battery fuse, inline fuse, or circuit protection fuse, we stock the common sizes and ratings needed for most e-bike systems.

This isn't just about saving you a few dollars on fuses: it's about getting you back on the road quickly. We keep an inventory of the fuses commonly used in direct-to-consumer e-bikes, so you don't have to wait for parts orders or hunt down specialty electrical components.

More importantly, when we replace a fuse, we also investigate why it blew. Fuses don't fail randomly: they protect against overloads, short circuits, and component failures. We trace the circuit to identify and fix the root cause, preventing future fuse failures.

Why Other Shops Won't Touch Your E-Bike

Traditional bike shops focus on mechanical repairs: derailleurs, brakes, chains, and wheels. They're experts at that work, but e-bike electronics require different tools, knowledge, and diagnostic approach.

Direct-to-consumer e-bike brands compound this challenge. Unlike major manufacturers like Bosch or Shimano that provide extensive dealer support and documentation, brands like Rad Power or Lectric often leave owners and repair shops without detailed technical information.

We've made it our business to understand these systems. We've collected service manuals, wiring diagrams, and technical specifications for dozens of direct-to-consumer brands. We've invested in the diagnostic equipment needed to properly test these systems. Most importantly, we've developed the experience to troubleshoot problems that don't follow textbook patterns.

Who We Serve

Our diagnostic service is designed for three main groups who depend on reliable e-bike performance:

E-Bike Hobbyists: You love working on your bike and understanding how it works, but you need professional-grade diagnostics to pinpoint electrical problems. We provide detailed diagnostic reports that help you make informed repair decisions or tackle DIY fixes with confidence.

Daily Commuters: Your e-bike gets you to work, school, or regular appointments. When it fails, you need fast, accurate diagnosis and repair. We understand that downtime costs you money and convenience, so we prioritize quick turnaround on diagnostic work.

Delivery Workers: Your e-bike is essential to your livelihood. Battery problems, charging issues, or electrical failures directly impact your income. We offer priority service and honest assessments to get you back to work as quickly as possible.

Professional Results You Can Trust

Our diagnostic service typically takes 1-2 business days, depending on the complexity of your system and our current workload. We provide detailed reports explaining what we found, what's working properly, and our recommendations for any needed repairs.

We're upfront about costs and options. If your battery needs replacement, we'll tell you. But if it can be repaired or restored for significantly less money, we'll explain those options too. Our goal is to get you the most reliable, cost-effective solution for your specific situation.

For complex problems, we can often provide loaner diagnostic equipment or temporary solutions to keep you mobile while we source repair parts or coordinate more extensive repairs.

Get Your E-Bike Diagnosed Properly

Don't let electrical problems keep you off the road or force you into expensive guesswork repairs. Whether your e-bike won't charge, cuts out randomly, or just doesn't seem to hold power like it used to, professional diagnostics can save you time, money, and frustration.

Contact us at pugetsoundtechnologies.com to schedule your battery and charger diagnostic service. We're here to help hobbyists, commuters, and delivery workers keep their direct-to-consumer e-bikes running reliably: with the professional service and expertise that other shops can't provide.