Adapters and Accessories

Our modular approach to benchtop programming saves you the unnecessary expense of duplicate hardware and harness components through the use of harness adapters and add-on accessories.

IMPORTANT! All OBD2 Switch Assemblies sold after 2/1/2017 include Pass-Through Harness EFI# 100-01032. ECU Programming Harnesses purchased after 2/1/2017 require a Pass-Through Harness to connect the ECU Programming Harness to the OBD2 Switch Assembly. This design change was necessary to accommodate programming harnesses new and upcoming ECUs. 

EFI Connection only offers OBD2 Switch Assemblies. J1939 Switch Assemblies are coming soon! J1939 products are shown below, but not available for sale.