Check the listing for details. Firstech FT-HRN-CMX-HC 8-Pin High Current Power Harness for CMX Compustar. Condition: Open box. Listed at 13.00 USD. The Firstech FT-HRN-CMX-HC 8-Pin High Current Power Harness is specifically designed for the CMX Compustar remote start and entry system. With a warranty of 1 year, this power harness provides a reliable connection for high current power transmission. The model number FT-HRN-CMX-HC ensures compatibility with the Compustar brand, making it an essential accessory for vehicle electronics and GPS systems.