Diagnostics that
make a difference
Non-intrusive signal measurement and fault simulation tools
for automotive engineers, educators, and workshops.
Trusted by over 2,000 workshops worldwide.
Breakoutbox with Y-cables
The best way to measure electric signals without damaging cables or connectors, while keeping the system running.
Stop Piercing into Wires. Learn More
Faillure Simulation
Create real faults. In a controlled environment. For ECU development or training purposes.
Full ECU control Learn More
Automotive Connectors
We have the connector you are looking for! Over 800 automotive connectors on stock with next-day delivery.
Stop piercing into wires. Measure like a pro.
The best way to measure electric signals without damaging cables, wires, terminals or connectors. Our breakout boxes combined with Y-cables give you full access to any signal on a running system.
- From 1 to 248 pin parallel signal measuring
- Non-invasive testing — no piercing, no damage to insulation
- Measure while the engine runs — sensor stays fully connected
- Easy connection for multimeters, oscilloscopes & data loggers
- Pin numbering matches the connector for instant identification
- Y-cables available for any pin count, any connector type
Breakoutbox
Entry-level breakout solution for signal measuring up to 18 pins with Y-cables. Compact design & easy to use.
Buy now- Ideal for every vehicle workshop
- Compatible with all major scan tools
- Serial measurement with 4mm banana plugs
Breakoutbox
Professional-grade solution for repair workshops. Extended pin coverage for complex ECU diagnostics.
Buy now- For advanced component measuring
- Custom pin configurations available
Breakoutbox
Full-coverage for ECU diagnostics and advanced measurement setups.
- For ECU diagnostics
- VIN based Custom Adapter Cable
- Custom pin configurations available
Breakoutbox
The most advanced parallel measurement solution.
- For ECU diagnostics
- VIN based Custom Adapter Cable
- Up to 248 pins with 2 boxes
A must-have tool
for any modern workshop.
Piercing into cables or probing through seals introduces moisture ingress, corrosion, and intermittent faults — problems that show up weeks later and cost hours to diagnose.
- Extend the lifespan of vehicle or device harnesses
- Avoid costly cable replacements from probing damage
- Compatible with any component, ECU, or vehicle platform
- Complete sets for automotive, agricultural & industrial
- Custom branded sets for OEMs and dealer networks
Keep the engine running.
The Y-cable sits between the sensor and the wiring harness connector. It functions like an extension cable, but with a parallel connection to the breakout box — giving you clean measurement access without interrupting the system.
During measurements the sensor remains connected and fully operational, enabling you to take readings while the motor management system is running under real conditions.
A — Motor management (ECU) · B — Harness connector · C — Sensor / actuator · D — Multimeter / scope · F — Breakout box
A Y-cable for every connection.
A complete range of Y-cables from a portfolio of over 800 connectors, enabling access to virtually any vehicle signal.
- Available in parallel configuration for measurement and in series configuration for fault injection.
- Fully compatible with 18-pin and 48-pin breakout boxes.
- Custom cable assemblies available on request.
A Y-cable set for every vehicle
We develop brand-, vehicle- and even model-specific Y-cable sets, ensuring you always have the right interface at hand.
From the most critical signals to the hardest-to-reach connections — everything accessible, organized and ready for diagnostics.Available in parallel configuration for measurement and in series configuration for fault injection.
- Model-specific sets covering the exact connectors used in your vehicle platform
- Parallel configurations for safe signal measurement
- Series configurations optional for controlled fault injection
Universal sets
Entry-level Y-cable set solution for students and independent technicians.
Shop Sets- 2 universal sets cover most vehicles
- 29 Y-cables per set included
- Parallel measurement configuration
- Coverage from 2–3 pin sensors up to 4–18 pin connectors
- Expandable as new connectors are released
Master sets
Standardised brand specific diagnostic sets for dealer networks and training centers
Shop Sets- Comprehensive connector coverage per vehicle platform
- Structured tool identification and labeling
- Expandable when new models are released
Vehicle-specific Sets
Advanced diagnostic solution tailored to a specific vehicle platform
Contact us- 100% coverage of all connectors of one specific vehicle
- Access to all relevant modules
- Parallel (measurement) and series (fault injection) configurations
Create real faults. In a controlled environment.
The Failure Simulation Box sits in series with the ECU. Every pin passes through the box — giving you switches, potentiometers, and LEDs to simulate any fault on a running engine.
- Non-invasive testing — no piercing, no damage to insulation
- Measure while the engine runs — sensor stays fully connected
- Clean connection for multimeters, oscilloscopes & data loggers
- Overlay allows you to read the pinout schedule for instant identification
- Adapter cables available for any pin count, any connector type
Simulate Resistance
Simulate poor contact in the plug terminals. Simulate resistance ranging from 10, to 100 kΩ. Manipulate signals using an external device. (i.e.: CAN-bus offset, Signal offset, voltage feeds, etc..)
Visualize Signals
Three integrated red LED’s can be connected to all signals like fuel injectors, relays, ignition, etc.
Automotive Grade Fusing
Standard, all channels are fused with a 5A automotive fuse, but you can easily be replaced these with a 10A fuse where needed.
Aerospace Grade Locking
Canon ITT - ZIF connectors used to connect the adapter cable. This ensures minimum of wear and tear on the measuring equipment and on the gold-plated contacts.
Key Functions
Wire break simulation
Simulate real-world wire breaks safely to test ECU responses and train diagnostic skills.
Signal IN – Signal OUT Configuration
Every ECU pin can be routed, manipulated, and measured, up to 10A signals. Anything higher is safely looped through while still allowing parallel measurement.
Parallel & Series Measuring
Switches allow users to toggle between normal operation (parallel) and inserting meters for AMP measurements (series).
LED indicators and precise potentiometers simulate real-world issues like resistance, shorts, or supply faults.
Benefits
Safe & Flexible Fusing
Each channel on FSB-M has 5A fusing, easily upgraded to 10A. LT models skip fuses for lighter applications.
Ground & Supply Management
Ground and supply connections are taken from the harness, keeping setups modular and realistic—no single point on the box.
Laser-engraved overlays enable clear labeling of each pin. Perfect for structured work (K94-01, A60-02) or functional names (INJ1, CAN1_H).
Overlay cover plates allow educators to hide faults for troubleshooting exercises, while the manipulation capabilities support ECU development and vehicle response tests.
For Trainers & Education
Take your students to the next level.
15% Faster Vehicle Development
Reduce testing time, increase reliability, and gain full control over your validation process. The Failure Simulation Box gives engineers the power to reproduce real-world faults in a controlled environment.
From sensor interruptions to wiring issues, every scenario can be tested without risking downtime or damaging valuable prototypes.
By combining the FSB with tailor-made adapter cables for each ECU, we ensure flawless integration with your engine setup.
- faster debugging
- more accurate diagnostics
- a significant reduction in development cycles.
Prepare students for
the real world from day one.
Reduce testing time, increase reliability, and gain full control over your validation process. The Failure Simulation Box gives engineers the power to reproduce real-world faults in a controlled environment.
From sensor interruptions to wiring issues, every scenario can be tested without risking downtime or damaging valuable prototypes.
By combining the FSB with tailor-made adapter cables for each ECU, we ensure flawless integration with your engine setup.
M-series Failure Simulation
High-density failure simulation for controlled ECU and component validation. Designed for professional development, training and advanced diagnostics.
Contact us- 232 independent channels
- Manual short-circuit
- Interruption simulation
- Available with secure cover plate for certified examinations and controlled environments
M-series Failure Simulation
High-density failure simulation for controlled ECU and component validation. Designed for professional development, training and advanced diagnostics.
Contact us- 155 independent channels
- Manual short-circuit
- Interruption simulation
- Available with secure cover plate for certified examinations and controlled environments
LT-series Field Failure Simulation
Compact and field-ready failure simulation for on-site diagnostics and validation. Designed for professional environments where reliability and control are essential.
Contact us- 78 independent channels
- 4 mm double-insulated plug
- Rugged housing for field use
Pro Trainer set
Professional training platform for controlled fault creation and signal measurement. Designed for education environments and certified examination setups.
Contact us- 20 or 40 independent channels
- 2mm banana plug interface
- Durable aluminium housing
- Available with locking mechanism for controlled access
Adapter Cable
We specialize in producing custom wiring harnesses designed for specific low-volume vehicles.
Custom made
Our solutions are particularly suitable for vehicle development and customizations by truck bodybuilders and automotive racing teams.
High Quality
With our expertise, you can rely on a high-quality, tailored product that meets your exact requirements.
from €995
With our expertise, you can rely on a high-quality, tailored product that meets your exact requirements.
Custom Solutions
Custom breakout boxes are engineered by ProTech Service & Engineering.
We translate your diagnostic challenge into a fully operational tool — designed, developed and validated for real-world workshop and OEM environments.
From first concept and connector selection to enclosure design, PCB development and final assembly — ProTech brings your specification to life.
Whether you require:
- A platform-specific breakout interface
- Integrated signal routing or switching
- Fault simulation capability
- Measurement protection and isolation
- Or a complete dealer tooling program
We engineer the solution around your vehicle architecture and diagnostic workflow.
We have the connector
you are looking for!
When a faulty connector brings your vehicle to a halt, waiting for a full harness or conducting a nationwide search is both time-consuming and costly.
With thousands of connectors and wire harness repair components—including terminals, seals, clips, wire, and tools—most orders are ready for same-day shipping.
Complete with Terminals and Seals
All of our connectors come fully equipped with the correct terminals and seals, so you never have to search for matching components.
This ensures that you can wire up the connector immediately without extra hassle, saving time and reducing the risk of errors.
Pre-Wired for Easy Repairs
For even faster repairs, our connectors are available pre-wired with a 10 cm lead. Simply solder and use a crimp connector to join the pre-attached wire to your vehicle’s wiring.
This eliminates complex assembly steps and allows for quick, reliable repairs right out of the box.
Repair sets
We offer brand-specific repair sets, designed as master cases for particular vehicle types.
Each set includes the most common connectors and components for that brand, allowing garages to perform repairs without endless searching or last-minute online orders.
Fast delivery & low MOQ
With stock available in the Netherlands, we are able to ship quickly, even for low minimum order quantities (MOQs).
Whether you need a single connector or a larger batch for ongoing projects, your parts arrive fast—minimizing downtime for your repairs or projects.
ABOUT BREAKOUTBOX
13 years of precision diagnostics.
+2.000 Customers
+30 Countries
Product lines
Four dedicated product lines covering breakout boxes, Y-cables, connector solutions and custom diagnostic tooling.
USE CASES
Built for those who build, teach, and repair.
OEM VEHICLE DEVELOPMENT
Designed to simulate, validate and verify. Breakoutboxen and failure simulation units allow engineers to test signals, inject faults and analyse ECU behaviour safely — long before vehicles reach the field.
Contact us
EDUCATION & TRAINING
Make diagnostics tangible for students. Trainers create faults, students diagnose them. Cover plates hide switches for certified examinations.
Contact us
VEHICLE REPAIR WORKSHOPS
Stop piercing wires and building DIY tools. Measure safely, protect your warranty process, and diagnose electronic faults with confidence.
Contact us
QUICK REPAIRS
Immediate signal access and professional repair connectivity. Identify electrical faults fast, replace or bridge damaged connectors where needed, and work without dismantling harnesses or piercing insulation. Less downtime, more precision.
Contact us
PREVENTIVE MAINTENANCE
Measure before failure occurs. Monitor voltage, continuity and signal behaviour proactively to prevent breakdowns and reduce unexpected service interventions.
Contact usKNOWLEDGE
Curious to learn more?
Ready to upgrade your diagnostics?
Talk to our engineers. We'll find the exact setup for your ECU,
your workflow, and your budget — including custom adapter cables.