Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.
Components
| Ref | Kind | Part | Exclude from BOM |
|---|---|---|---|
| MAIN-R | connector | ||
| NEW-BATT | terminal | ||
| NEW-FUELPUMP | terminal | ||
| NEW-KEYON | terminal | ||
| OEM-A | connector | ||
| OEM-B | connector | ||
| OEM-D | connector | ||
| SP-0V | splice | ||
| SP-GND | splice | ||
| SPEEDUINO-A | connector | ||
| SPEEDUINO-PWR | connector |
Create part
Cut list
Lengths need a layout (0 of 20 routed).
| Wire | From / To | Gauge | Signal |
|---|---|---|---|
| W1 | NEW-KEYON-1 / MAIN-R-COIL+ | 0.5 | Relay coil positive (ignition-switched +12V) |
| W2 | NEW-BATT-1 / MAIN-R-IN | 0.85 | Relay contact input (battery + via main fuse) |
| W3 | MAIN-R-COIL- / SP-GND-1 | 0.5 | Relay coil negative (ECU low-side driver) |
| W4 | MAIN-R-OUT / SPEEDUINO-PWR-12V | 0.85 | Relay contact output (switched +12V bus) |
| W5 | OEM-A-26 / SP-GND-1 | 0.85 | Power ground (E01/E02) |
| W6 | SP-GND-1 / SPEEDUINO-A-10 | 0.85 | Ground |
| W7 | SP-GND-1 / SPEEDUINO-A-9 | 0.85 | Ground |
| W8 | OEM-B-9 / SP-0V-1 | 0.5 | Sensor ground (E2) |
| W9 | SP-0V-1 / SPEEDUINO-A-12 | 0.5 | Ground |
| W10 | SP-0V-1 / SPEEDUINO-A-23 | 0.5 | Ground |
| W11 | OEM-A-12 / SPEEDUINO-A-1 | 0.5 | Injectors 1 & 4 (No.10) |
| W12 | OEM-A-11 / SPEEDUINO-A-2 | 0.5 | Injectors 2 & 6 (No.20) |
| W13 | OEM-A-25 / SPEEDUINO-A-3 | 0.5 | Injectors 3 & 5 (No.30) |
| W14 | SPEEDUINO-A-16 / NEW-FUELPUMP-1 | 0.5 | Proto area 3 (fuel pump) |
| W15 | OEM-B-11 / SPEEDUINO-A-22 | 0.5 | Throttle position sensor (VTA) |
| W16 | OEM-B-4 / SPEEDUINO-A-19 | 0.5 | Coolant temp (THW) |
| W17 | OEM-B-2 / SPEEDUINO-A-14 | 0.5 | Karman-vortex AFM signal (KS) |
| W18 | OEM-B-6 / SPEEDUINO-A-21 | 0.5 | Primary O2 sensor (OX1) |
| W19 | OEM-B-3 / SPEEDUINO-A-20 | 0.5 | Intake air temp (THA) |
| W20 | OEM-D-9 / SPEEDUINO-A-18 | 0.5 | Vehicle speed sensor (SPD) |
Bill of materials
No parts in this harness.