J. J. Keller® Encompass® Fleet Management System ELD Harnesses & Adapters

J. J. Keller® Encompass is the industry’s most versatile fleet management system. To support this versatility, we offer a variety of adapters to fit the unique needs of your fleet.

Select your ELD harness and/or harness adapter based on the manufacturer and model year of your vehicle(s).

JBus Adapters 16-Pin OBDII Adapters Telematics Harness
6-Pin 9-Pin 9-Pin Locking Nut Class 1–6 HD–Mack/Volvo RP 1226
6-Pin JBus Adapter
50098
9-Pin JBus Adapter
50101
9-Pin JBus V2 500 KB Adapter – High Speed
50102
9-Pin JBus 250 KBPS Locking Nut Adapter
51521
9-Pin JBus 500 KBPS Locking Nut Adapter
51522
9-Pin JBus 500 KPBS Locking Nut Adapter
56439
Class 1-6
50100
HD - Mack/Volvo
50099
RP 1226
57057
Manufacturer Model Year
Daimler/Freightliner Cascadia   2009–2016 2017–2020            
Daimler/Freightliner LT Series < 2005 2006–2009              
Daimler/Freightliner M2 & Columbia CL Series 1993–2008 2005–2016              
Daimler/Sterling 1996–2006 2006–2011              
Ford F550 & below             1997–2020    
Ford LN & F550 & up 1994–2015                
Freightliner < 2005 2006–2015 2015–2020           2019–2020*
GMC/Chevrolet 4500 & up   1995–2016              
GMC/Chevrolet 5500 & below             1997–2020    
Hino/Toyota   2006–2020         2013–2020    
International 1993–2014 1995–2016 2017–2020            
Isuzu FTR/FVR   2003–2009         2005–2009    
Isuzu NPR/NQR/NRR             2012–2017    
Kenworth 1987–2005     2010–2016 2016–2020** Oct. 2018–2020***     Oct. 2018–2020***
(requires use of switched power adapter [sold separately])
Mack 1991–2012 1996–2016 2016–2020         2014–2020  
Mercedes Sprinter             2011–2017    
Motor Coach Industries 1994–2000 2005–2016              
Peterbilt 1987–2005     2010–2016 2016–2020** Oct. 2018–2020***     Oct. 2018–2020***
(requires use of switched power adapter [sold separately])
Prevost 1993–2006 2005–2016              
Ram 5500 & below             2007–2017    
Volvo VNL 1999–2015 2003–2016 2016–2020         2014–2020  
Western Star 1995–2008 2005–2016 2017–2020            

*Freightliner 2019–2020, models M2 106, M2 112, 108 SD and 114 SD, may use the RP 1226.

**Paccar (Peterbilt and Kenworth) – Cab size < 2.1 meters.

***Paccar (Peterbilt and Kenworth) – Cab size > 2.1 meters.

Disclaimer: While every attempt has been made to ensure the accuracy of this information, there may be exceptions. Therefore, we recommend that you or the vehicle's owner visually inspect the vehicle's diagnostic port connection to verify the proper harness connector required.