• You must make sure that the wheels are unable to roll even on a flat surface during the procedure to ensure safety. To do that, wedging the wheels is an excellent idea. You can use chocks to do the trick. These are triangular-shaped blocks built from rubber and metal that prevents the wheels from rolling in any direction. Place a wedge or chock in front of each wheel in the opposite direction of the vehicle from where you are to lift.
  

• However, if you can't manage to find any chocks, you can simply use wedge-sized rocks, woods, or metal pieces to wedge your car-wheels.
  

• In case you must park your car on an inclined path, try parking it next to a curb and turn the wheels into the curb so that it can restrain the wheels from rolling over.

Step#1. Locate the jack point

•  First, you have to locate the jack point underneath your vehicle. Most vehicles have more than one jack points where you can attach the jack for lifting. It’s wise to use the dedicated jack points as lifting from some other point may cause the car's own weight to damage the frame. It may even cause the vehicle to slip off the jack. Check your car manufacturer's owner's manual to find the exact location of these points.
  

• Most cars contain a jack point on car sides behind the front wheels and ahead of the rear wheels. It can be beside the hard metal or plastic strips under the doors, also known as rocket panels. You may also find two more points behind the front and rear bumpers.

• However, if you're not familiar with jack points, look for a welded metal ribs beneath your car. You may also find them by looking for a notch that matches the pattern of the top of the jack. Your vehicle may even have a spot levelled "jack" on the spot places.

Step#2. Place the jack below the jack point

• After locating and selecting a jack point, place your car jack under the jack point. If it doesn’t line up with the car, that’s normal as you can move it around until it is getting the vehicle.

• Make sure you’re using the jack in the proper orientation. Many jacks come indications with "this side up" warning. However, if yours don’t have that indication,check the owner's manual for guidelines. A car jack usually has a broad plain base and a smaller upward-facing arm with "teeth" at the edges that face up towards the body of the vehicle.
  

Step#3. Elevate the car jack

• The correct way of raising a jack depends on its type. There are numerous types of car jacks available in the market. They often work on different mechanisms. However, we'll discuss the two most used types of car jacks that are the scissor jacks and the hydraulic jacks.

• Scissor Car Jacks: These jacks have a collapsible mechanism that’s very similar to how a scissor operates.They have two parallel metal plates with a triangular-shaped arrangement between them. One side of the jack contains a metal hole that is connected to the main screw drive. In order to use it, you need to slip the included rod tool through that hole and turn it to raise the jack and lift the car.

• Hydraulic Car Jacks: These jacks are also called floor jacks. They have a handle like base extending mechanism to one side. You can find a slot to slip the included rod tool into on one side. Move the rod up and down to pump hydraulic fluid into the cylinder. As you pump, the jack will rise and lift your vehicle.
  

Step#4. Elevate the car

• You’ll find the jack harder to raise as it touched the vehicle. Keep raising the jack upward until the corner of the car leave the ground. Continue the process until your vehicle has achieved the desired ground clearance that the task requires. Typically, you only need a few inches of raise to do almost all sorts of modifications.
  

• While lifting the jack or after you have finished lifting the car, listen carefully for any screeching or "thud" sound from either the vehicle or the jack. It may mean that your jack hasn't attached to the car correctly or that it's failing. Working under this condition may cause fatal accidents. So, always be sure before you go underneath the vehicle.

• Never try lifting the car while you're underneath it. A slight slip may cause the vehicle to fall directly on to you. Always lift your vehicle first and then check whether or not the car is secured and supported by the jack correctly before working underneath.

Step#5. Place jack stands underneath the car

• Always use jacks stands when you have to put any of your body parts underneath a vehicle. Jack stands offer a broader, more secure base and supports the car’s weight better than a single jack base. It’s never a good idea to work underneath a vehicle without jack stands.
  

• You need to place at least two jack stands for secure hold. Lift the jack stands until they almost touch the underside of the vehicle. Then lower the jack carefully until the car rests on the jack stands.
  

Step#6. Lower the Car Jack when finished

• After you're done, it's time to lower the vehicle down. Just like lifting the required two different methods for two different types of car jacks, lowering the jack also have different ways for scissor jacks and hydraulic jacks

Hydraulic Jacks:

• In the case of a hydraulic jack, you just need to release the valve. It will drain the fluid out of the hydraulic cylinder and lower the jack in the process.