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Disconnect the battery negative, disconnect the battery positive, unbolt any brackets which are holding the battery in place (look to the bottom of the battery for these), pull the battery out, installation is the opposite of removal.
The battery is under the floor of the trunk on the right side. You can't disconnect it under the hood.
Disconnect the cables at the 1997 Nissan battery. After following one cable to the other end, disconnect it then pull it out. Feed the new cable in the same way. Connect the non battery end. Do the same for the other cable then connect the cables to the battery.
Disconnect the battery
If you disconnect the battery (or the battery is very low and a relay will automatically disconnect the battery) you need to input the code for the radio. Maybe you battery is too old or too discharged.
Disconnect the battery for a few minutes
Scan tool or battery disconnect.
Disconnect the cable from the LeSabre battery. Follow the route of the cable and disconnect the other end. Pull the cable out, then fit the new cable in the same direction. Connect the non battery end, then connect to the battery.
HEY BEEVIS....NOTHING will work after you disconnect the battery......DUHHHHH !!!!!
Remove the old battery, disconnect the negative cable first and install the new battery connect the negative cable last.
This car may need the battery in the system to complete all circuits. Are you trying to test your alternator?
disconnect the negative battery terminal for 10 minutes.