Electrical Reference
Honda
Common wire colors, fuse box locations, and relay tap points for Honda motorcycles. Always verify with a multimeter before making connections.
Common Wire Colors
These are typical colors across recent Honda models. Colors can vary between model years — always verify with a multimeter.
| Color | Function |
|---|---|
| G | Ground (chassis) |
| R | Battery positive (always hot) |
| BK/W | Ignition switch (accessory) |
| O | Turn signal left |
| LBL | Turn signal right |
| LG | Horn circuit |
Fuse Box
Usually located under the seat or behind the left side panel. Honda uses blade-type fuses. The main fuse (30A) is often separate near the battery. Check for an auxiliary fuse slot.
Relay Tap Points
- ✓Turn signals: O (left) and LBL (right) wires at the rear sub-harness connector
- ✓Horn: LG wire at the horn — Honda horns are grounded through the button
- ✓Key switch: BK/W wire provides switched 12V when ignition is on
- ✓Always-hot 12V: R wire at the battery terminal with inline fuse
Notes
- •Honda uses GREEN for ground (not black) — don't confuse with turn signals on other brands
- •CB/CBR models have good under-seat space for mounting
- •Rebel/cruiser models: fuse box often behind the left side cover