2008 Toyota Prius Hitch Wiring | Harnesses, Adapters Toyota Prius 2008, Towing Wiring Harness by Hopkins®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by Hopkins will.. 1 Complaints: 2008 Toyota Prius Electrical System: Wiring 2008 Toyota Prius. Consumer writes in regards to illuminated warning light and dash not working. The consumer stated that vehicle was not covered under the recall due to the age of the vehicle.