Vehicles have various electrical parts. To protect the parts from excessive current generated when welding, be sure to perform the following procedure.
1. Turn the ignition switch to the LOCK position.
2. Disconnect the battery cables.

3. Securely connect the welding machine to the ground near the welding area.
4. Cover the peripheral parts of the welding area to protect them from weld spatter.

Electrical troubleshooting tools
Jacking positions ,vehicle lift (2 supports),safety stands (rigid rack)
positionsMazda 6 Service Manual: Rear window glass removal
1. For the 4SD, remove the following parts:
(1) Remove the headliner.
(2) Remove the rear package trim.
2. For the 5HB, remove the following parts.
(1) Remove the rear wiper arm and blade.
(2) Remove the liftgate lower trim.
3. Apply protective tape along the edge of the body to pr ...
Mazda 6 Service Manual: Battery recharging
Warning
Keep any flammable away from the battery, otherwise evaporated gas
of the battery fluid may catch fire, and cause serious injury or death.
Caution
When removing the battery, disconnect the negative battery cable
first and install it last to prevent damage to electrical compo ...