GODIAG GT108 OBDII Universal Conversion Adapter

GODIAG GT108 OBDII Universal Conversion Adapter For Cars, SUVs, Trucks,Boats, Motorcycles

Overview

The GODIAG GT108 Super OBDI-OBDII Universal Conversion Adapter lets you convert old OBDI diagnostic ports into standard OBDII interfaces using a flexible DIY wiring scheme. It supports cars, trucks, motorcycles, boats, generators, and standalone ECU modules.

Key Features

• Converts OBDI diagnostic interfaces to OBDII via DIY wiring terminals.
• Reverse connection protection to prevent damage from wrong wiring.
• Independent GND4 and GND5 lines to manage vehicle grounding properly.
• Analog IGN switch to simulate ignition signal when needed.
• LED indicators for power, ground switching, and ignition status.
• Configurable for both car & truck protocols (C configuration combines both A & B).
• DIY wire locking with screw terminals and multiple interface kits included.

Usage / How to Use

1. Determine your vehicle’s diagnostic interface pin mapping.
2. Wire the GT108 terminals to match OBDI to OBDII assignments, then lock wires.
3. Connect GND lines first, then power (BAT+). If vehicle diagnostic port lacks power, use battery input via the adapter.
4. Optionally switch IGN line to output ignition if needed.
5. Connect communication lines (CAN, K-Line etc.). For truck protocols, use in combination with a 24V→12V adapter (GT106).
6. Connect your diagnostic or programming tool on the OBDII side and begin operations.

Godiag GT108 Connection Diagram:

Audi VW Skoda Seat/ BMW/ Ford/ Mazda PIN

Mercedes- Benz 38 PIN

For more, please check Godiag GT108 User Manual.

Technical / Hardware Features

GODIAG GT108 OBDII Universal Conversion Adapter

• Reverse polarity protection
• Independent GND4 / GND5 switching
• Analog ignition (IGN) switch and output
• DIY wiring terminal blocks with screw locking
• Indicator LEDs for status (power, ground mode, ignition)

Included in the Box

• GT108 conversion adapter (C configuration)
• Diagnostic jumper kits for car & truck interfaces
• Power cord with battery clips
• Screwdriver for terminal screws
• Instruction manual