Your safety first

1. Be sure to remove any metal accessories including metal rings, necklaces, and bracelets. When working with batteries, metals could cause strong electric sparks. That could put you in high risks.
2. Avoid wearing clothes with loose straps. If it gets caught in various rotating objects such as alternator, catastrophic accidents could occur. If you have long hair, tie long hair to avoid being pulled into the various rotating belts and objects.
3. Use protective gloves, a mask, and safety glasses depending on the job. Using metal brush to remove rust on the brake rotor, for example, could be very harmful to your lungs. When working with various oils, use gloves to protect the skin. Wear masks when working with batteries as well.
4. When using a jack to lift the vehicle front,  switch the gear to parking. Put wheel choks on both sides of the wheel. In particular, when using the jack and jack stands, you must follow the safety guidelines provided by the supplier.
5. For jack and jack stand points, refer to the manual for each vehicle's pinch weld spots. A typical passenger sedan weighs between 1.3 and 2 metric tons. Therefore, a 6 metric ton jack (about 13,228 lbs) stand is recommended. Again, do refer to the manual.

Vehicle damage

1. Disconnect the battery terminals during various electrical work including alternator. When disconnecting the battery, disconnect the negative terminal first and then the positive terminal. When connecting, connect the positive post first and then the minus post.
2. When jumping the vehicle due to battery discharge, ensure that minus connector is NOT hooked into the battery minus post to avoid potential spark and battery sensor burning. The strut mount bolt, engine block and ground bolt are the good choices.

For other details

1. Always, you should refer to the safety information in the vehicle manual.
2. Since each vehicle may be different, you should always refer to your vehicle manual. In particular, follow the safety rules when working with electrical devices and suspensions are very important.