Before you begin any work on your vehicle, it’s important to ensure that you are safe. If your car is on the road, move it to a secure location away from traffic. Turn on your hazard lights to alert other drivers to your situation. If possible, park your car on a flat, level surface.
If you’re on the side of the road, use a reflective warning triangle to help other drivers see you clearly, especially if it’s nighttime or visibility is poor.