A pre-trip check takes far less time than finding a repair shop on the road. Focus on tires, fluids, lights and safety-critical basics.
Tires and spare
Check cold tire pressure, visible damage, tread condition and the spare tire or repair kit.
Fluids
Check engine oil, coolant and brake fluid according to the vehicle manual, using the correct conditions and level surface.
Lights and wipers
Test headlights, brake lights, indicators, washer fluid and wiper condition.
Documents and emergency basics
Verify insurance, documents, phone charging and basic emergency supplies before departure instead of on the roadside.
Bottom line
Keep the solution simple: start with the most likely cause, change one factor at a time, and observe the result. That makes it much easier to identify what actually works in your situation.