Astra F Wiring Diagram Jun 2026

| Circuit | Power Source | Fuse | Relay | Wire Color (Feed) | Wire Color (Ground) | Connector Location | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | | Battery + | F9 (30A) | K7 | B+ to ignition | N/A (case ground) | Starter solenoid | | Fuel Pump | Ignition (15) | F6 (15A) | K8 (under hood) | RT/GE (Pump positive) | BR (near pump hanger) | Under rear seat, left | | Low Beams | Battery (30) | F13/F14 | K6 (low beam) | WS (Left) / WS/GE (Right) | BR (near headlamp) | Headlamp plug | | Cooling Fan | Battery + | F5 (30A) | K2 (rad fan) | RT/SW (Fan high speed) | BR (thermoswitch) | Radiator thermoswitch | | O2 Sensor | ECU | F11 (10A) | N/A | GN (signal to ECU pin 29) | BR/GE (sensor ground) | Near catalytic converter |

Here is the coolest hack about the Astra F diagram: astra f wiring diagram

Probe between the relay output and the solenoid wire (Black/Red, often labeled “B/R”). If voltage is present but the starter doesn’t crank, the problem is the solenoid or the engine ground strap. | Circuit | Power Source | Fuse |

Once you see the pattern in the "spaghetti," you won't just fix the car. You will understand it. You will understand it