Harness assessment cheat sheet
Harness Assessment Cheat Sheet
Table of Contents
Table of Contents        1
Vehicle Assessment Instructions        1
Vehicle Type Overview        2
Light-Duty Vehicles        2
Heavy-Duty Trucks        2
Finding the Diagnostic Port        2
VIN Decoding        2
Harness Estimates        3
Compatibility Table        3
Light Duty        3
Electric Vehicles        6
Heavy Duty        6
Equipment & Off Road Assets        9
WARNING! Use Geotab telematics devices only with Geotab-approved harnesses acquired from Geotab-authorized channels. Use of non-Geotab harnesses from unauthorized channels can cause serious safety risks, including fire, and can lead to serious personal injury and/or damage to the vehicle. |
! IMPORTANT:Â For heavy-duty trucks, always use a vehicle-specific harness when offered by Geotab or the vehicle manufacturer (see Harness Identification and Application [PUB]Â and Harness Assessment Cheat Sheet GUIDE V2.0 [PUB]). Where a heavy-duty truck-specific harness is not offered by Geotab or the vehicle manufacturer, use the adapter harness (HRN-CG13S1) for any 16-pin (OBDII) installation method to avoid possible GO device damage. |
Vehicle Assessment Instructions
- Request a complete vehicle list from the customer, which includes:
- VIN
- Manufacturer
- Model
- Year
- Use this Excel template to prepare a list of vehicles for harness assessment.
- Ensure that there is no missing information or incomplete entries.
- Normalize the manufacturer and model names.
- For example, change all variations of model name like F-150 and F150 in a single way.
- Use the Summary tab to get counts of each vehicle type.
- Use the compatibility table to determine which harnesses are required for each vehicle.
Vehicle Type Overview
Light-Duty Vehicles
All light-duty vehicles made in 1997 and afterwards will have a 16-pin OBD II port. They will be able to use the standard HRN-BS16S4 or HRN-BS16S4F harness or the HRN-GS16K2 universal T-harness. Review the compatibility table for any exceptions.
Heavy-Duty Trucks
Listed below are a number of common heavy-duty truck manufacturers:
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GO RUGGED
GO RUGGED requires specific harnesses for installation. For more detailed information about installation and harness types, please see the Vehicle Specific Installation Notes and the Harness Identification and Application document.
Finding the Diagnostic Port
There are several websites that can help you find the diagnostic port in your vehicle:
- Wiki OBDÂ - Europe, Latam, Asia, Africa and Australia
- Innova DLC — North America only
- CarMD — North America only
- The Diagnostic Box — North America & Europe
- Outils OBD Facile — North America & Europe
VIN Decoding
If you only have a VIN, there are plenty of online VIN decoding sites that you can use to retrieve the Make, Model and Year of a vehicle.
Harness Estimates
Note: Geotab does not guarantee that the following suggestions are 100% accurate. They are best guess and are considered to be estimates based on experience. |
Compatibility Table
Light Duty
Make | Model | Year | Straight Harness | T-Harness | Notes |
All | All | <1996 | HRN-CW03K3 | Any vehicle without an diagnostic port | |
All light duty | All | 1997+ | HRN-BS16S4 or HRN-BS16S4F | HRN-GS16K2 | See exceptions below |
Ford | |||||
Ford | F150–F550 | 1997+ | HRN-BS16S4 or HRN-BS16S4F | HRN-GS16K2 | |
Ford | F650+ | 1997+ | HRN-DS09S4 | HRN-GS09K2 | Please confirm diagnostic port to ensure it is 9-pin prior to purchasing 9-pin harness. Could have 16-pin OBDÂ II. |
Ford | Fiesta | 1997+ | Must use T-harness | HRN-GS16K2 | Must use T-harness due to the location of the diagnostic port |
Ford | Fusion | 1997+ | Must use T-harness | HRN-GS16K2 | Must use T-harness due to the location of the diagnostic port |
Dodge | |||||
Dodge | All | 1997+ | HRN-BS16S4 or HRN-BS16S4F | HRN-GS16K2 | Please confirm diagnostic port to ensure it is 16-pin OBDÂ IIÂ prior to purchasing harness. |
GM/Chev | |||||
GM/Chev | All light-duty GM/Chevy cars/trucks (i.e. Cruze, Malibu, Silverado, Sierra, etc.) | 1997+ | HRN-BS16S4 or HRN-BS16S4F | HRN-GS16K2 | Please confirm diagnostic port to ensure it is 16-pin OBDÂ IIÂ prior to purchasing harness. |
Chevrolet | C4–C7 & T6–T8 Series | 2006–2009 | HRN-BS16S4 or HRN-BS16S4F | HRN-GS16K2 | Please confirm diagnostic port to ensure it is 16-pin OBD II prior to purchasing harness. |
GMC | C4–C8 & T6–T8 Series | 2006–2009 | HRN-BS16S4 or HRN-BS16S4F | HRN-GS16K2 | Please confirm diagnostic port to ensure it is 16-pin OBD II prior to purchasing harness. |
Nissan | |||||
Nissan | Frontier | 1997+ | Must use T-harness | HRN-GS16K2 | Must use T-harness due to the location of the diagnostic port |
Nissan | UD | 2009 | HRN-DS09S4 | HRN-GS09K2 | Vehicle has two diagnostic ports — do not connect to the OBDII port |
Isuzu | |||||
Isuzu | All | 1997+ | HRN-BS16S4 or HRN-BS16S4F | HRN-GS16K2 | Please confirm the diagnostic port to ensure it is 16-pin OBDÂ IIÂ prior to purchasing the harness. |
Isuzu | Diesel Vehicles | 2017+ | N/A | HRN-CM24Y1 + HRN-CI04A2 | This harness is only meant for diesel vehicles and supported engine data from the FMS port inside the vehicle |
Mercedes-Benz | |||||
Mercedes | All | 1997+ | HRN-BS16S4 or HRN-BS16S4F | HRN-GS16K2 | |
Mercedes | Sprinter | 2019+ | HRN-CP04A2 + HRN-CM24Y1Â (for PSM connection) | 907 & 910 chassis only | |
Hino | |||||
Hino | All | 1997+ | HRN-BS16S4 or HRN-BS16S4F | HRN-GS16K2 | Vehicle has two diagnostic ports - Data typically comes through the 16-pin but in some cases the 9-pin. |
Hino | 300 Series | 1997-2016 | HRN-BS16S4 or HRN-BS16S4F | HRN-GS16K2 | |
Hino | 200-500 Series | 2016-2018 | HRN-CM24Y1 + HRN-CH06A2 | Special adapter HRN-CH06A2 harness required | |
Hino | All | 2019+ | HRN-CM24Y1 + HRN-CH10A2 | Special adapter HRN-CH10A2 harness required | |
Mitsubishi | |||||
Mitsubishi | All Light Duty | 1997+ | HRN-BS16S4 or HRN-BS16S4F | HRN-GS16K2 | Please confirm diagnostic port to ensure it is 16-pin OBDÂ IIÂ prior to purchasing harness. |
Mitsubishi Fuso | All | <2009 | HRN-CW03K3 | N/A | Please use HRN-CW03K3 unless confirmed diagnostic port with Auxiliary port. If Auxiliary port present, use HRN-BU16Y5. |
Mitsubishi Fuso | All | 2010+ | HRN-BU16Y5 | N/A | Must use HRN-BU16Y5. May require HRN-CW03K3Â if no Auxiliary port is available. |
Workhorse Chassis | |||||
Workhorse Chassis | All | 1999–2002 | HRN-BS16S4 or HRN-BS16S4F | HRN-GS16K2 | Please confirm diagnostic port to ensure it is 16-pin OBD II prior to purchasing harness. |
Electric Vehicles
Make | Model | Year | Straight Harness | T-Harness | Notes |
Tesla | |||||
Tesla | Model S | 2012- mid 2015* | HRN-CT06A1 + HRN-CM24Y1 | N/A | Please check the diagnostic connector of any MY2015 Model S prior to purchasing the harness |
Tesla | Model S | Mid 2015+ | HRN-CT06A11 + HRN-CM24Y1 | N/A | |
Tesla | Model X | All | HRN-CT06A11 + HRN-CM24Y1 | N/A | |
Tesla | Model 3 | 2018 | N/A | HRN-CT20T1 | Diagnostic port can be found on the floor in the middle of the rear |
Tesla | Model 3 | 2019+ | N/A | HRN-CT20T11 | Diagnostic port can be found on the floor in the middle of the rear |
Heavy Duty   Â
Make | Model | Year | Straight harness | T-harness | Notes |
All Heavy Duty (see list above) | All | 1997–1999 | HRN-DS06S4 | HRN-DS06T2 | |
International | |||||
International | 7300–9900 | 2000–2005 | HRN-DS06S4 | HRN-DS06T2 | For MY2005, please check your diagnostic port prior to purchasing the harness. |
International | 7300–9900 | 2006+ | HRN-DS09S4 | HRN-GS09K2 | |
International | 5500i–9900i | 2000–2007 | HRN-DS06S4 | HRN-DS06T2 | Please check your diagnostic port prior to purchasing the harness |
International | 5500i–9900i | 2008+ | HRN-DS09S4 | HRN-GS09K2 | |
Peterbilt & Kenworth | |||||
Peterbilt | All | 2000–2007 | HRN-DS09S4 | HRN-GS09K2 | Please confirm Diagnostic port as in some cases the vehicle may have a 6-pin port and will require the HRN-DS06T2 |
Peterbilt | All | 2008+ | Must use T-harness | HRN-GS09K2 | Must use T-harness due to the location of the diagnostic port |
Peterbilt | All | 2017+ | Must use T-harness | HRN-GS09K2 | If the vehicle is using Paccar Motors MX13 and MX15, must use HRN-BS04A1. (GO7 and GO8 only, not required for GO9) |
Peterbilt | Paccar Motors MX13 and MX15 | 2017+ | N/A | HRN-GS09K2 & HRN-BS04A1 (GO7 and GO8 only, not required for GO9) | If the vehicle is using Paccar Motors MX13 and MX15, must use HRN-BS04A1. Please see the next row if the vehicle is equipped with a 14 pin (RP1226) port. Must use HRN-CS14S21. |
Peterbilt | All models | 2019+ | HRN-CS14S21 | If the vehicle is not equipped with a 14 pin (RP1226) diagnostic connector use the 9 pin harness HRN-GS09K2 | |
Kenworth | All | 2000–2012 | HRN-DS09S4 | HRN-GS09K2 | |
Kenworth | All | 2013+ | Must use T-harness | HRN-GS09K2 | Must use T-harness due to the location of the diagnostic port |
Kenworth | All | 2017+ | Must use T-harness | HRN-GS09K2 | See Installation Notes for more info.If the vehicle is using Paccar Motors MX13 and MX15, must use HRN-BS04A1. (GO7 and GO8 only, not required for GO9) |
Kenworth | Paccar Motors MX13 and MX15 | 2017+ | N/A | HRN-GS09K2 & HRN-BS04A1 (GO7 and GO8 only, not required for GO9) | If the vehicle is using Paccar Motors MX13 and MX15, must use HRN-BS04A1.(GO7 and GO8 only, not required for GO9) Please see the next row if the vehicle is equipped with a 14 pin (RP1226) port. Must use HRN-CS14S21. |
Kenworth | All models | 2019+ | HRN-CS14S21 | If vehicle is equipped with a 14 pin (RP1226) port, use this harness as more data is sent through this port | |
Freightliner | |||||
Freightliner | All Medium Duty (i.e. M2 106 Medium Duty) | 2000+ | HRN-DS09S4 | HRN-GS09K2 | |
Freightliner | All Heavy/Super Duty (ie. Cascadia, 114SD, 122SD & 108SD) | 2000–2012 | HRN-DS09S4 | HRN-GS09K2 | |
Freightliner | All Heavy/Super Duty (ie. Cascadia, 114SD, 122SD & 108SD) | 2013+ | Must use T-harness | HRN-GS09K2 | Must use T-harness due to the location of the diagnostic port |
Freightliner | All models | 2019+ | HRN-CS14S21 | HRN-GS09K2 | If a vehicle is equipped with a 14 pin (RP1226) port, use HRN-CS14S21 as more data is sent through this port. If not, then use HRN-GS09K2t. |
Volvo: IMPORTANT The OBDII port MUST NOT be used for 2019+. Always use a vehicle-specific harness when offered by Geotab or the vehicle manufacturer. Where a heavy-duty truck-specific harness is not offered by Geotab or the vehicle manufacturer, use the adapter harness (HRN-CG13S1) for any 16-pin (OBDII) installation method to avoid possible GO device damage. | |||||
Volvo | All Heavy Duty (ie. VNM, VNL, VNX, VHD, VAH, VNR) | 2000–2009 | HRN-DS09S4 | HRN-GS09K2 | |
Volvo | All Heavy Duty (ie. VNM, VNL, VNX, VHD, VAH, VNR) | 2010-2018 | N/A | HRN-CM24Y1 + HRN-CE10K2 | |
Volvo | All models | 2019-2021 | HRN-CM24Y1 + HRN-CE10K2 | ||
Volvo | All models | 2021+ | HRN-CS14S21 | If vehicle is equipped with a 14 pin (RP1226) port, use this harness as more data is sent through this port | |
Mack:  IMPORTANT The OBDII port MUST NOT be used for 2019+. Always use a vehicle-specific harness when offered by Geotab or the vehicle manufacturer. Where a heavy-duty truck-specific harness is not offered by Geotab or the vehicle manufacturer, use the adapter harness (HRN-CG13S1) for any 16-pin (OBDII) installation method to avoid possible GO device damage. | |||||
Mack | All | 2000–2005 | HRN-DS09S4 | HRN-GS09K2 | |
Mack | Models: CTP, CXP, CHP, CHU, CXU & GU | 2006-2018 | N/A | HRN-CM24Y1 + HRN-CK10K2 | |
Mack | Models: GR, AN & PI | 2019 | N/A | HRN-CM24Y1 + HRN-CE10K2 | |
Mack | All models | 2019/2021 | HRN-CM24Y1 + HRN-CE10K2 | ||
Sterling | |||||
Sterling | All (except Bullet) | 1997–1999 | HRN-DS06S4 | HRN-DS06T2 | |
Sterling | All (except Bullet) | 2000+ | HRN-DS09S4 | HRN-GS09K2 | |
Sterling | Bullet | 2008-2009 | HRN-BS16S4 or HRN-BS16S4F | HRN-GS16K2 | |
Equipment & Off Road Assets
Note: The GO RUGGED is mandatory for these vehicles. |
Make | Model | Year | Straight harness | T-harness | Notes |
All Equipment | All | 2000+ | See Notes | HRN-GR09K1 | General guideline for all yellow iron equipment. Please check the table for specific manufacturers. Check for diagnostic port. If no port, only the HRN-RW03K4Â will be required. See exceptions below. |
Caterpillar | All equipment with diagnostic port | 2000–2016 | HRN-GR09K1 + HRN-RMRCA1 | Please confirm there is a diagnostic port prior to purchasing harness. If no port exists, HRN-RW03K4 will be required. | |
Caterpillar | All equipment with 14 pin Deutsch diagnostic port | 2016+ | HRN-DC14S2 | N/A | Please confirm there is a 14 pin diagnostic port prior to purchasing harness. If no port exists, HRN-RW03K4Â will be required. Some 9-pin diagnostic ports in Cat equipment may have a different pin configuration and would require the HRN-DC09T2 & HRN-RS12S2. |
John Deere | All | 2000+ | HRN-GR09K1 | Please confirm there is a diagnostic port prior to purchasing harness. If no port exists, HRN-RW03K4Â will be required. | |
Komatsu | All | 2000+ | HRN-GR09K1 | Please confirm there is a diagnostic port prior to purchasing harness. If no port exists, HRN-RW03K4Â will be required. |