Final answer:
One would find past repair information of a vehicle in the vehicle service history, which is essential for diagnosing recurring issues such as a dead battery and tracking the vehicle's maintenance timeline.
Step-by-step explanation:
If a vehicle returns to the shop three times with a dead battery, one would find past repair information of the vehicle in the vehicle service history. This history typically includes detailed records of all maintenance work and repairs that have been performed on the vehicle, noting the dates, the parts replaced, and the service performed. It is critical for diagnosing recurring issues like a routinely dead battery and enables mechanics to track the vehicle's maintenance timeline and any patterns in mechanical problems or parts failures.