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T-HARNESS INSTALLATION FOR:
2018 Ram 1500
2019-2020 Ram 1500 Classic
2018-2020 Ram 2500-5500
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.
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.
2. Connect the Z-Flash to the T-Harness OBD-II
port where the green and white plugs exit from.
3. Connect the female end of the T-Harness into the
vehicles OBD-II port that you removed in step 1.
3
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.
Quick Reference Guide
Connects to Star Board
5
Replaces factory OBD-II Port
1
Connects to Z-Flash
4
3
Connects to factory OBD-II port
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.
To Remove T-Harness
from Star Board:
Press the tab inside of
the white plug from the
2
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.
1
2
4
1.
2.
4
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