Bypass Cable Installation | Dodge RamUpdated 4 months ago
This only applies to the 2018+ Cummins models.
Please watch this video as it will guide you through the entire process
The video down below is used on a EZLYNK 2019-2021 cummins. The process of any other tuner is exactly the same. Please follow along the video to install your SOTF switch.
You will need the bypass cable in order to install the tuner, otherwise, you tuner will not be able to communicate with your truck at all!
Locate the back of the OBD2 Connector,
Replace pins 6 & 14 the yellow with yellow and the green with tan.
For the 2019, 2020 and 2021, replace the yellow with tan and the green with yellow.
*This Cable is intended for permanent Install.
The mating end plugs into the star module (location varies).
Here are some sample images:
If you are having a hard time with the installation, you can also use the instructions below. This uses a different bypass cable but the instructions may help regardless.
**PLEASE NOTE, This cable is a DIFFERENT color**
but works the same and might be a bit more clear for instructions.
2018-2021 Cummins Bypass Cable Installation
1. Twist the tan and yellow wires so that there is at least one twist every two inches.
2. Carefully, remove the OBDII connector from the dash by depressing the tabs on the sides.
3. Remove the two grey pin retainers from the back of the connector.
4. One at a time, remove & replace the yellow and brown wires from locations 6 & 14. For a 2018 truck, replace the yellow with yellow and the brown with tan. For the 2019, 2020 and 2021s, replace the yellow with tan and the brown/green with yellow. No matter the wire colors, the pins go in 6 and 14.
NOTE: If you install the cable and can’t connect to the truck, try swapping the wires.
Another Note: A 1.5mm wide flat terminal release tool or a pointed sewing needle works for removing pins.
OBDII Connector
5. Reinstall the two grey pin retainers.
6. Locate the green “Star” connector above the parking brake. For 2018 plug the harness into any empty space, for 2019-2021 plug the harness into the fifth position from the left at the bottom.
2018 Star Connector
2019/2020/2021 Star connector
7. Cover & insulate the pins you removed from the OBDII connector.
8. Reinstall the OBDII connector into the factory location.
This cable is meant to be installed and left in the vehicle, NOT intended to be uninstalled and re-used. Once installed, the OBDII will still function normally.