Rams Custom Auto Repair Demonstrates THINKTOOL Expert 391 with HDMOD

Ram Custom Repairs
Published On: April 1st, 2026

Rams Custom Auto Repair recently hosted a hands-on demonstration showcasing the THINKTOOL Expert 391 alongside the HDMOD (Heavy Duty Module) from LaunchSA. The session highlighted how workshops can combine professional diagnostic capabilities for both passenger vehicles

Rams Custom Auto Repair recently hosted a hands-on demonstration showcasing the THINKTOOL Expert 391 alongside the HDMOD (Heavy Duty Module) from LaunchSA. The session highlighted how workshops can combine professional diagnostic capabilities for both passenger vehicles and commercial trucks using a single integrated platform.

This demonstration provided practical insights into real-world diagnostics, showing technicians how to increase efficiency, reduce vehicle downtime, and expand service offerings.

What Is the THINKTOOL Expert 391 Used For?

The THINKTOOL Expert 391 is a professional-grade diagnostic scanner designed for workshops requiring full-system diagnostics across multiple vehicle brands.

Key applications demonstrated at Rams Custom Auto Repair included:

  • Comprehensive ECU and system diagnostics for cars and light commercial vehicles

  • Reading and clearing Diagnostic Trouble Codes (DTCs)

  • Monitoring live sensor data for accurate troubleshooting

  • Bi-directional testing for system component verification

  • Service reset functions including oil reset, brake pad reset, DPF regeneration, TPMS reset, and throttle adaptation

With support for over 90 vehicle brands, the Expert 391 provides accurate, fast, and reliable diagnostics suitable for professional workshops.

Expanding Capability with HDMOD

By integrating the HDMOD, the Expert 391 becomes capable of diagnosing heavy-duty trucks and commercial vehicles.

With HDMOD, technicians can:

  • Work with 12V and 24V commercial vehicle systems

  • Access heavy-duty ECUs for trucks, buses, and fleet vehicles

  • Perform component tests and active system diagnostics

  • Read and clear fault codes across commercial vehicle systems

This module allows workshops to cover both light and heavy-duty diagnostics without the need for multiple separate tools, streamlining workflow and reducing equipment costs.

Demonstration Highlights

During the Rams Custom Auto Repair session, the following tasks were showcased:

  • Full-system scan on a passenger vehicle using Expert 391

  • Live data streaming to verify faults

  • Performing service resets and component testing

  • Switching to HDMOD to simulate heavy-duty diagnostics on a commercial truck

Technicians were able to see firsthand how a single platform can seamlessly transition between vehicle types, improving efficiency and reliability.

Why Workshops Choose THINKTOOL Expert 391

Workshops choose the Thinktool Expert 391 because it offers:

  • Full-system diagnostics for passenger and light commercial vehicles

  • Scalable heavy-duty capability with HDMOD

  • Fast and accurate fault detection

  • Bi-directional testing and service reset functions

  • Regular software updates ensuring up-to-date vehicle coverage

This combination makes it a versatile and future-ready solution for any South African workshop.

How It Improves Workshop Workflow

Integrating the Expert 391 with HDMOD improves workflow by:

  • Reducing diagnostic time and vehicle downtime

  • Allowing technicians to handle both light and heavy-duty vehicles on a single platform

  • Expanding service offerings without increasing complexity

  • Minimizing errors and improving diagnostic accuracy

This streamlined approach enhances productivity and reduces operational costs for busy workshops.

Who Should Use THINKTOOL Expert 391 with HDMOD

This setup is ideal for:

  • Independent automotive workshops

  • Fleet maintenance operations

  • Mixed workshops servicing passenger and commercial vehicles

  • Heavy-duty vehicle specialists

  • Workshops seeking a scalable, all-in-one diagnostic solution

For workshops managing diverse vehicles, the Expert 391 with HDMOD ensures complete diagnostic coverage.

Upgrade Your Workshop Diagnostics

The Rams Custom Auto Repair demonstration showcased the versatility and efficiency of the THINKTOOL Expert 391 with HDMOD. By combining passenger vehicle and heavy-duty diagnostics into a single platform, workshops can improve accuracy, reduce downtime, and expand service capabilities.

For South African workshops looking to future-proof their operations, investing in the Expert 391 and HDMOD provides a reliable, professional, and scalable diagnostic solution.

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