1979 VW Bus EV Conversion — System Wiring Schematic
Rev R3 · HyPer 9HV / X144 (ISO) · Orion BMS 2 (48S) · 7× Tesla · Elcon 6.6kW · Dual Contactor
VW Bus docs:
Design Spec
Wiring Guide
Schematic
Motor Commissioning
Cable Schedule
Coolant Routing
KB-4 JSON
1979 VW Bus EV Conversion — System Wiring Schematic (Rev R3)
HyPer 9HV / X144 ISO · Orion BMS 2 (48S) · 7× Tesla 5.3kWh · Elcon 6.6kW · Dual Contactor
Battery Pack
7× Tesla Model S · 42S
126V – 176V · ~37 kWh
PACK+ (M1+)
PACK− (M7−)
HVBD4AXR
Disconnect
F4 10A · Precharge
Relay → B+ Pre
F1
500A/220V
DHAB S/155
Current Sensor
F3 20A
DC-DC 1kW
GV200PA-1
Main (+) · K1-25/26
HV_BUS_POS
F2 60A · Charger
UPSTREAM · plug-and-charge
F5 25A · LEV100
CanEV Heater (driving only)
REC35P1KX
Neg (−) · via interposing relay
HV_BUS_NEG
HV− returns (charger, DC-DC, heater)
X144 Controller (ISO)
HyPer-Drive · Isolated Logic
B+
B−
K1-24: Key Switch (12V)
K1-25/26: GV200 Coil
K1-11: Throttle (EVW-TH-HALL)
K1-5/6: Forward / Reverse
K1-18/19: Profile 2/3 (regen)
K1-4: Interlock
K1-2/13: CAN Bus C (250K)
K1-3↔14: 120Ω jumper
K1-21/33: Encoder Sin/Cos
K1-9: Encoder GND
K1-32: Motor Thermistor
K1-35: +5V Out (enc+throttle)
U
V
W
HyPer 9HV Motor
Encoder · Thermistor · 3-Phase
Orion BMS 2 (48S)
On shelf in CR battery box
Pin 1: Always On 12V
Pin 2: READY (ignition)
Pin 3: CHARGE (J1772)
Pin 6: Charger Safety (WD)
Pin 7: Disch Enable → interposing relay → REC35 (WD)
Pin 8: Charge Enable (WD)
Pin 10: Fan Enable (175mA)
Pin 12: Ground
Pin 13/14: J1772 CP / Prox
Pin 26: Kill Authority (WD)
CAN1 (18/19): Bus A 500K
CAN2 (20/21): Bus B 250K
Cell taps: Conn 1+2 → 7 modules
Thermistors: T1–T8
Current sensor: DHAB 4-wire
Pin 7
Pin 26 → Perm Chain
12V → Ignition → Inertia → Pin26 Relay
→ X144 K1-24 (12V only!)
Speedhut SOC
Bus A · 500K
Elcon Charger
Bus B · 250K · CAN-3865
Touch Display
Bus C · 250K
Tach (EVW-CBTH9)
Bus C · 120Ω SW1
J1772R-V2
32A Receptacle
CP/Prox → BMS 13/14
12V System
NLX24 Battery
DC-DC → 14V/72A
Legend:
HV+ (2/0 AWG)
HV− (2/0 AWG)
Precharge / Branch
CAN Bus
Signal / Control
3-Phase (U/V/W)
(WD) = Watchdog backed
All HV cable: 2/0 AWG orange w/ red(+) / black(−) boots · CAN: twisted pair shielded · 60Ω per bus · ISO logic: K1-24 max 24V! · Charger+DC-DC UPSTREAM of GV200 · Heater DOWNSTREAM
Reference only — verify all connections against actual hardware and primary source manuals before wiring.
Compare with:
EV West Hyper9HV Universal Battery Schematic
·
EV West Hyper 9 Kit Schematic