Tesla Model X 2016 Emergency Response Manual page 11

Battery Low-Voltage
When the vehicle's hood is opened, the 12V battery is accessible underneath the
access panel next to the windshield. When necessary, the negative battery cable should be
double cut to open the 12V battery circuit. Care should always be taken to not make contact
with the positive and negative battery terminals when double cutting the negative battery
cable.
In addition to the high voltage system, Model X has a low voltage electrical system. Its 12V
battery operates the SRS, airbags, windows, door locks, touchscreen, and interior and
exterior lights. The DC-DC converter in the high voltage system charges the 12V battery, and
the 12V battery supplies power to the high voltage contactors, allowing high voltage current
to flow into and out of the high voltage battery. The 12V battery, outlined in red, is located
under the hood and the plastic access panel.
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Model X Emergency Response Guide