How To Check which Harness is Required for my Vehicle

Related Questions

  • Which harness do I need?

Applies To

  • GO Device


  1. Go to
  2. Select Harness and Adapters Support
  3. Open the Harness Assessment Cheat Sheet document by selecting it
  4. Open the Harness Identification and Application document by selecting it

Additional notes

The harness required for your vehicle depends on which port connection your vehicle has. Most vehicles have the standard OBDII port that does not need a harness as the GO device can plug directly into the port. If the vehicle has a 9-pin or 6-pin connector, then the appropriate 6- or 9-pin interface harness will be required to connect the GO device to the vehicle.

If your vehicle has a different connector than the ones listed above or does not have a connector, then the 3-wire harness will be required for your vehicle.

If you are unsure about the connector your vehicle has or what harness you need, please contact your Authorized Geotab Reseller for further assistance.

Geotab does not guarantee that these suggestions are 100% accurate. They are best guess and are considered to be estimates based on experience.

Please ensure that you confirm diagnostic port of each vehicle prior to purchasing a harness.