Harness assessment cheat sheet

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: For heavy-duty trucks, always use a vehicle-specific harness when offered by Geotab or the vehicle manufacturer (see Harness Identification and Application [PUB] 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

To complete a vehicle assessment, follow the steps below:

Request a complete vehicle list from the customer, which includes:

VIN,
Manufacturer,
Model, and
Year.

Use the 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 (E.g. change all variations of model names 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 have a 16-pin OBD II port. They are able to use the standard HRN-BS16S4, HRN-BS16S4F Harness, or the HRN-GS16K2 universal T-Harness. Review the Compatibility Table for any exceptions.

✱ NOTE: A standard GO9 device is also a 16-Pin Port, so a harness may not be required.

Heavy-Duty Trucks

Listed below are a number of common heavy-duty truck manufacturers:

International,
Freightliner,
Peterbilt,
Kenworth,
Sterling,
Mack,
Volvo,
Isuzu, and
Mitsubishi (Fuso).

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

The websites below can assist in finding the diagnostic port in your vehicle.

Wiki OBD — 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 access to a VIN, there are plenty of online VIN decoding sites that can be used to retrieve the Make, Model and Year of a vehicle.

Harness Estimates

! IMPORTANT: Geotab does not guarantee that the following suggestions are 100% accurate. They are best guesses and are considered to be estimates based on experience.

Compatibility Table

Light-Duty

The following table provides information regarding the Light-Duty vehicle type.

Make	Model	Year	Straight Harness	T-Harness	Notes
All	All	<1996	HRN-CW03K3		Any vehicle without a 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 the diagnostic port to ensure it is 9-pin prior to purchasing a 9-pin harness. Could have 16-pin OBD II.
Ford	Fiesta	1997+	Must use T-harness	HRN-GS16K2	Must use T-harness due to the location of the diagnostic port. The 2017+ Mk7 models can be directly plugged into 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 the diagnostic port to ensure it is 16-pin OBD II 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 the diagnostic port to ensure it is 16-pin OBD II prior to purchasing harness.
Chevrolet	C4–C7 & T6–T8 Series	2006–2009	HRN-BS16S4 or HRN-BS16S4F	HRN-GS16K2	Please confirm the 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 the 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	The vehicle has two diagnostic ports — do not connect to the OBD II port.
Isuzu
Isuzu	All	1997+	HRN-BS16S4 or HRN-BS16S4F	HRN-GS16K2	Please confirm the diagnostic port to ensure it is 16-pin OBD II prior to purchasing the harness.
Isuzu	Diesel Vehicles	2017+	N/A	HRN-CM24Y1 + HRN-CI04A2	For diesel vehicles only and supported engine data from the optional FMS port inside the vehicle. Requires HRN-CM24Y1 and Isuzu’s optional FMS kit #8983519390.
Mercedes-Benz
Mercedes	All	1997+	HRN-BS16S4 or HRN-BS16S4F	HRN-GS16K2
Mercedes	Sprinter	2019+	HRN-CP04A2 + HRN-CM24Y1 (for PSM connection)		907 & 910 chassis only.
Hino
Hino	All	1997-2011	HRN-BS16S4 or HRN-BS16S4F	HRN-GS16K2	The vehicle has two diagnostic ports. Data typically comes through the 16-pin but in some cases the 9-pin.
Hino	200-500 Series	2012-2018		HRN-CM24Y1 + HRN-CH06A2	Special adapter HRN-CH06A2 harness required.
Hino	100 Series	2012-2018		HRN-CM24Y1 + HRN-CH10A2	Special adapter HRN-CH10A2 harness required.
Hino	All	2019-2020		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 the diagnostic port to ensure it is 16-pin OBD II prior to purchasing the harness.
Mitsubishi Fuso	All	<2009	HRN-CW03K3	N/A	Please use HRN-CW03K3 unless confirmed diagnostic port with Auxiliary port. If an Auxiliary port is present, use HRN-BU16Y5.
Mitsubishi Fuso	All	2010+	HRN-BU16Y5	N/A	Must use HRN-BU16Y5. May require HRN-CW03K3 if no Auxiliary port is available.
Workhorse Chassis
Workhorse Chassis	All	1999–2002	HRN-BS16S4 or HRN-BS16S4F	HRN-GS16K2	Please confirm the diagnostic port to ensure it is 16-pin OBD II prior to purchasing the harness.

Electric Vehicles

The following table provides information regarding the Electric vehicle type.

✱ NOTE: All BYD trucks made in North America require a proprietary harness, which Geotab does not make in-house. For BYD vehicles outside North America please work with your regional Solutions Engineering rep, the EV team, and your BYD point of contact to determine the appropriate harness to use.

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	The diagnostics port can be found in the rear behind the lower center console panel.
Tesla	Model 3	2019+	N/A	HRN-CT20T11	The diagnostics port can be found in the rear behind the lower center console panel.
Tesla	Model Y			HRN-CT26T1	The diagnostics port can be found in the rear behind the lower center console panel.
BYD
BYD	All Bus Models	All	HRN-BS16S4	HRN-GS16K2	Only applicable for BYD buses made in North America. For BYD buses made outside North America, please work with your Geotab Solutions Engineering team member and BYD person of contact to determine the appropriate harness to use.

Heavy Duty

The following table provides information regarding the Heavy-Duty vehicle type.

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 the 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
Peterbilt	All	2017+	N/A	HRN-GS09K2 & GO9	To guarantee proper operation of the GO device data points, it is recommended that a GO9 is used exclusively for 2017+ Peterbilt. Some motors (MX13 and MX15) may not operate properly on G07 and G08 platforms.
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 information .If the vehicle is using Paccar Motors MX13 and MX15, must use HRN-BS04A1. (GO7 and GO8 only, not required for GO9).
Kenworth	All	2017+	N/A	HRN-GS09K2 & GO9	To guarantee the operation of the GO device data points, it is recommended that the GO9 is used exclusively for 2017+ Kenworth. Some motors (MX13 and MX15) may not operate properly on G07 and G08 platforms.
Kenworth	All models	2019+	HRN-CS14S21		If the 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 the 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-GS09K2.
Volvo ! IMPORTANT: The OBD II 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 (OBD II) installation method to avoid possible GO device damage.
Volvo	All Heavy Duty (ie. VNM, VNL, VNX, VHD, VAH, VNR)	2000–2013	HRN-DS09S4	HRN-GS09K2	Models from 2004 to 2013 can either use a HRN-GS09k2 or HRN-CM24Y1+HRN-CE10K2. See the Installation Instructions here.
Volvo	All Heavy Duty (ie. VNM, VNL, VNX, VHD, VAH, VNR)	2004-2018	N/A	HRN-CM24Y1 + HRN-CE10K2	Models from 2004 to 2013 can either use a HRN-GS09k2 or HRN-CM24Y1+HRN-CE10K2. See the Installation Instructions here.
Volvo	All models	2019-2021		HRN-CM24Y1 + HRN-CE10K2	Installation Instructions
Volvo	All models	2021+	HRN-CS14S21		If the vehicle is equipped with a 14-pin (RP1226) port, use this harness as more data is sent through this port.
Mack ! IMPORTANT: The OBD II 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 (OBD II) installation method to avoid possible GO device damage.
Mack	All	2000–2005	HRN-DS09S4	HRN-GS09K2
Mack	Cabover models	2000-2012		HRN-GS09K2
Mack	Models: CTP, CXP, CHP, CHU, CXU & GU	2006-2018	N/A	HRN-CM24Y1 + HRN-CK10K2	2006-2018 Mack Install Guide
Mack	Models: GR, AN & PI	2019	N/A	HRN-CM24Y1 + HRN-CE10K2	Installation Instructions
Mack	All models	2019/2021		HRN-CM24Y1 + HRN-CE10K2	Installation Instructions
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.

The following table provides information regarding the Equipment and Off-Road Assets.

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 exists, only the HRN-RW03K4 is 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 the harness. If no port exists, HRN-RW03K4 is 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 the harness. If no port exists, HRN-RW03K4 is required.
John Deere	All	2000+		HRN-GR09K1	Please confirm there is a diagnostic port prior to purchasing the harness. If no port exists, HRN-RW03K4 is required.
Komatsu	All	2000-2009		HRN-GR09K1	Please confirm there is a diagnostic port prior to purchasing the harness. If no port exists, HRN-RW03K4 is required.
Komatsu	All	2010+		HRN-RC12T2	Please confirm there is a 12-pin diagnostic port prior to purchasing the harness. If no port exists, HRN-RW03S4 is required.

Engine Control Module (ECM) and Non-Engine Control Module