RP1226 Cable Installation
Last updated July 25, 2025
Specific RP1226 Cable Installation for Various Truck Make & Models
Switchboard offers different cables depending on the type/make/model/year of your vehicle. To find out which cable you should use, go here: Determining ECM cable to use with the Switchboard Engine Module. To purchase a Switchboard Engine Module cable, visit the Switchboard online store. To view general installation instructions, visit Installing the ELD Engine Module
When installing the RP1226 ELD cable, you will need to locate the RP1226 port on your vehicle. This article shows you were to find the port depending on which vehicle you have.
Kenworth / Peterbilt
RP-1226 connector is on the driver’s left side of the cab.
- Remove the fuse box panel below the 9-pin port (the panel below the fuse box may also require to be removed to access the connector).
- Locate the connector tucked away behind the fuse box.
Freightliner (Heavy Duty: e.g. Cascadia and New Cascadia)
RP-1226 connector is located on the passenger side of the cab.
Freightliner (Light/Medium Duty: e.g. M2, 108SD, and 114SD)
RP-1226 connector can be found in either the passenger side doghouse under the fuse box or in the center of the overhead console (if present).
International
RP-1226 connector can be found on the floor beneath the center console behind the bottom panel.
Western Star
RP-1226 connector can be found in the left-side of passenger side dashboard, behind the center console.
Mack
RP-1226 connector can be located in the passenger side dashboard behind or underneath the fuse box. It may also be located in the fuse box area where the connector for the previously supported 3031 cable is found.
Volvo
RP-1226 connector is located at the top of the dashboard near the fuse box. It is located in the same spot where the previously supported 3034 cable was installed.
