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Standalone Battery Wiring
VoltDecode supports logging directly from a standalone Tesla Model S/X legacy battery pack.
This requires an adapter cable between the battery connector, an OBDLink adapter and an external 12 V supply.
Required hardware
- OBDLink LX or MX+ Bluetooth adapter
- External 12 V power supply or small 12 V battery
- Molex 0334721202 connector
- OBDII female connector
- 60 Ω resistor between CAN High and CAN Low
Wiring schematic
Connections
- OBDII pin 4 → Molex pin 8 → 12 V negative (GND)
- OBDII pin 16 → Molex pin 2 → 12 V positive
- OBDII pin 6 → Molex pin 10 (CAN High)
- OBDII pin 14 → Molex pin 9 (CAN Low)
- 60 Ω resistor between CAN High and CAN Low (value is not critical, 75 Ω also works fine)
Warning:
Working with high-voltage battery systems can be dangerous.
This information is intended only for users with sufficient technical knowledge and experience.
Incorrect wiring or handling may result in damage, injury or hazardous situations.
