Hey Ray, thanks for reaching out!
The Tuson DirecLink Base Model Trailer Brake Controller # 335DL-100 can definitely be used with your 2005 Freightliner Century Class either by splicing in the wiring or using one of the following adapters if they match your truck:
- 6-Pin # 335HDCON-6PIN
- 9-Pin # 335HDCON-9PIN
- 9-Pin with Green Connector # 335HDCON-9PIN-G500
- 16-Pin # 335HDCON-16PIN
You'll also need to install the Universal Wiring Kit # ETBC7 if you don't already have a functioning... view full answer...