DIY - Volkswagen Tiguan - How to Replace Car Battery and Charging System Voltage Check

How to check charging output voltage. - battery voltage while engine is not running is 12 volts - battery voltage across terminal while engine is running must be greater than 14 volt How to safely disconnect battery terminals and Replace the battery Tools and Battery 13 mm socket to remove battery tie down bracket 10 mm open end wrench to disconnect battery cables Caution: always disconnect NEG cable first (if the tool accidentally slipped and touched the side frame of the chassis, there will not be any electrical discharge or spark), then POS cable second once you able to isolate the NEG battery post from the battery cable. When re-connecting the car battery, always do the POS cable (to prevent potential electrical short circuit) then NEG last . 1 battery . $149.00 CDN from Costco with $10.00 core return credit DIY time: 30 min