Though The Curt Echo Under-Dash Wireless Brake Controller # C27JR will work with your 2004 International 4300.
Before installing a brake controller you will have to find the 7 wire plug in the frame rail behind the cab which contains the wires for lights and signals. From there you will have to wire that into the wiring kit # ETBC7. You will have to cut off the 4-way on the ETBC7 and then use a circuit tester # PTW2992 so you can determine all the functions of the wires on your truck.... view full answer...
Go To Results