Sadly many years ago, TYCO Toys ceased production of the US1 Trucking sets in 1986 and has been defunct since 1997. There are ways to give new life to your trucking set! The best way is by upgrading the power pack which is a simple process. You can either purchase a spare power pack and use the cord from it or cut and splice an existing one.
You can find new/used AFX Tri Power Packs on eBay- https://ebay.us/3gORGr and sometimes on Amazon- https://amzn.to/3dDvnQH Use my purchased links above! I get a small commission from Amazon and/or eBay that helps support my site! If you want to purchase a donor power pack for the cord, click here. This site contains affiliate links for which I may be compensated. As an eBay Partner and Amazon Associate, I may be compensated if you make a purchase at no cost to you. I appreciate your support!