4
T-HARNESS INSTALLATION FOR:
5. The last OBD-II plug on the T-Harness can be put back into the vehicle’s
OBD-II holder where you removed the OBD-II port from in step 1.
Press the tab inside of
the white plug from the
T-Harness and carefully
pull out of the green
Star Board. You may
need to use a small
screwdriver to press
the tab or pull the plug
out of the Star Board.
4. Connect the white plug from the T-Harness into the green Star
Board located up and under the driver’s side dashboard near the
OBD-II port. If you have multiple green Star Boards then you will
need to use the one with the white plugs and yellow wires. You can
use any open port.
3. Connect the female end of the T-Harness into the
vehicles OBD-II port that you removed in step 1.
2. Connect the Z-Flash to the T-Harness OBD-II
port where the green and white plugs exit from.
1. Using the two clips on the side of the OBD-II port, squeeze
and push the port forward to push it out of the holder.
Connects to Z-Flash
Replaces factory OBD-II Port
Connects to Star Board
Connects to factory OBD-II port
This harness prevents you from having to access the security
gateway and install a Gateway Bypass Module on the 2018 Ram
1500, 2019-2020 Ram 1500 Classic and 2018-2020 2500-5500
Rams. Once your T-Harness is installed you will not need a
Z-Flash Gateway Bypass Module. The T-Harness does not need
to be removed when getting the vehicle serviced. The T-Harness
also acts as a splitter and leaves room for an additional OBD-II
device to be connected to the vehicle.
2
2
1
1
3
3
5
4
4
1.
2.
Quick Reference Guide
To Remove T-Harness
from Star Board:
2018 Ram 1500
2019-2020 Ram 1500 Classic
2018-2020 Ram 2500-5500
