Harness assessment cheat sheet

Harness Assessment Cheat Sheet

April 2021

Table of Contents

Vehicle Assessment Instructions        1

Vehicle Type Overview        2

Light-Duty Vehicles        2

Heavy-Duty Trucks        2

GO Rugged        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


Warnings and Considerations

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.

  1. Request a complete vehicle list from the customer, which includes:
  • VIN,
  • Manufacturer,
  • Model, and
  • Year.
  1. 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.
  1. 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.

guide-to-geotab-harnesses-obd-diagram.png

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.

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+

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

300 Series

1997-2016

HRN-BS16S4 or HRN-BS16S4F

HRN-GS16K2

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 harness.

Mitsubishi Fuso

All

<2009

HRN-CW03K3

N/A

Please use HRN-CW03K3 unless confirmed diagnostic port with Auxiliary port. If 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 harness.

Electric Vehicles

The following table provides information regarding the Electric vehicle type.

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 diagnostic port can be found on the floor in the middle of the rear.

Tesla

Model 3

2019+

N/A

HRN-CT20T11

The diagnostic port can be found on the floor in the middle of the rear.

Tesla

Model Y

HRN-CT26T1

The d.

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

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 information .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 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)

2000–2009

HRN-DS09S4

HRN-GS09K2

Volvo

All Heavy Duty (ie. VNM, VNL, VNX, VHD, VAH, VNR)

2010-2018

N/A

HRN-CM24Y1 + HRN-CE10K2

Installation Instructions

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

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+

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

NOTE: The GO RUGGED is mandatory for these vehicles.

Intelligent ECM (Engine Control Module)

The following table provides information regarding the Intelligent ECM.

Harness

Description

HRN-RZ04S4

Ford Model type Engine MSG-425. 2.5 liter (Ground Service Equipment).

HRN-RZ04T4

Kubota Type Engine MA-40-36 (Ground Service Equipment).

NON-ECM

The following table provides information regarding the Non-ECM.

Harness

Description

HRN-RW04S4

 All Equipment with Ground Disconnect on Asset and/or NON-ECM with no true ignition.

HRN-RW03S5

NON-ECM with no true ignition using Low Voltage/Primary side of ignition coil.

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