W1 OEM-4-A · Chassis ground SP-GND-1 — 0.85 mm² (≈18 AWG) — — — × W2 OEM-4-C · Chassis ground SP-GND-1 — 0.85 mm² (≈18 AWG) — — — × W3 OEM-4-D · Chassis ground SP-GND-1 — 0.85 mm² (≈18 AWG) — — — × W4 OEM-4-K · Chassis ground SP-GND-1 — 0.85 mm² (≈18 AWG) — — — × W5 SP-GND-1 SPEEDUINO-A-10 · Ground — 0.85 mm² (≈18 AWG) — — — × W6 SP-GND-1 SPEEDUINO-A-9 · Ground — 0.85 mm² (≈18 AWG) — — — × W7 OEM-3-O · Sensor ground SP-0V-1 — 0.5 mm² (≈20 AWG) — — — × W8 OEM-4-H · Crank pickup timing ground (CKP gnd) SP-0V-1 — 0.5 mm² (≈20 AWG) — — — × W9 SP-0V-1 SPEEDUINO-A-12 · Ground — 0.5 mm² (≈20 AWG) — — — × W10 SP-0V-1 SPEEDUINO-A-23 · Ground — 0.5 mm² (≈20 AWG) — — — × W11 OEM-3-I · +5V sensor reference SPEEDUINO-A-13 · 5V — 0.5 mm² (≈20 AWG) — — — × W12 OEM-4-E · Crank position (CKP) sensor SPEEDUINO-A-25 · Crank input / VR1+ — 0.5 mm² (≈20 AWG) — — — × W13 OEM-4-G · CAS SGC (cam sync) SPEEDUINO-A-24 · Cam input / VR2+ — 0.5 mm² (≈20 AWG) — — — × W14 OEM-4-F · CAS SGT (cam trigger) SPEEDUINO-A-26 · VR2- — 0.5 mm² (≈20 AWG) — — — × W15 OEM-4-N · Ignition coil trigger (cyl 1&4) SPEEDUINO-A-7 · Ignition 1 — 0.5 mm² (≈20 AWG) — — — × W16 OEM-4-R · Ignition coil trigger (cyl 2&3) SPEEDUINO-A-34 · Ignition 2 — 0.5 mm² (≈20 AWG) — — — × W17 OEM-4-U · Injector 1 (cyl 1) SPEEDUINO-A-1 · Injector 1 — 0.5 mm² (≈20 AWG) — — — × W18 OEM-4-V · Injector 2 (cyl 2) SPEEDUINO-A-2 · Injector 2 — 0.5 mm² (≈20 AWG) — — — × W19 OEM-4-W · Injector 3 (cyl 3) SPEEDUINO-A-3 · Injector 3 — 0.5 mm² (≈20 AWG) — — — × W20 OEM-4-X · Injector 4 (cyl 4) SPEEDUINO-A-5 · Injector 4 — 0.5 mm² (≈20 AWG) — — — × W21 OEM-3-F · Throttle position (TPS) SPEEDUINO-A-22 · TPS input — 0.5 mm² (≈20 AWG) — — — × W22 OEM-3-G · Engine coolant temp (CLT) SPEEDUINO-A-19 · Coolant temp (CLT) — 0.5 mm² (≈20 AWG) — — — × W23 OEM-1-A · Cooling fan relay (low-side) SPEEDUINO-A-16 · Proto area 3 (fuel pump) — 0.5 mm² (≈20 AWG) — — — × W24 OEM-1-B · A/C condenser fan relay SPEEDUINO-A-15 · Proto area 2 (fan) — 0.5 mm² (≈20 AWG) — — — × W25 OEM-1-G · A/C clutch relay SPEEDUINO-A-36 · Idle 2 (3-wire idle) — 0.5 mm² (≈20 AWG) — — — × W26 OEM-1-U · Fuel pump relay (low-side) SPEEDUINO-A-35 · Boost — 0.5 mm² (≈20 AWG) — — — × W27 OEM-3-M · Front O2 heater control SPEEDUINO-A-37 · PWM idle — 0.5 mm² (≈20 AWG) — — — × W28 OEM-1-E · Check engine light (MIL) SPEEDUINO-A-38 · VVT — 0.5 mm² (≈20 AWG) — — — × W29 OEM-4-L · Tachometer output SPEEDUINO-A-17 · Proto area 4 (tachometer) — 0.5 mm² (≈20 AWG) — — — × W30 OEM-3-H · EGR boost sensor SPEEDUINO-A-11 · MAP sensor (0-5V) — 0.5 mm² (≈20 AWG) — — — × W31 OEM-3-C · Front O2 sensor input SPEEDUINO-A-21 · O2 sensor — 0.5 mm² (≈20 AWG) — — — × W32 OEM-3-K · Intake air temp (IAT) SPEEDUINO-A-20 · Inlet air temp (IAT) — 0.5 mm² (≈20 AWG) — — — × W33 OEM-1-M · Vehicle speed sensor (VSS) SPEEDUINO-A-14 · Proto area 1 (flex fuel) — 0.5 mm² (≈20 AWG) — — — × W34 OEM-1-C · Starter input (12V while cranking) SPEEDUINO-A-18 · Proto area 5 (clutch) — 0.5 mm² (≈20 AWG) — — — ×