Overview The OP13 uses Purple Line electrical architecture compliant with NFPA 1192, FMVSS 571, and SAE standards. Wiring employs marine-grade copper conductors insulated with T90 nylon 75 °C. Diagrams include:
- 7-pin vehicle hookup and external lighting
- Chassis breakaway and auxiliary power routing
- Interior 12V DC and 110V AC combined circuits (solar, inverter, battery charger, appliances, lighting, pumps, heater pads)
These are reference schematics only. High-resolution versions appear in the OP13 Owner’s Manual (2025 edition) on the Opus Owner Portal. Any modification requires a certified RV technician to maintain warranty and safety compliance.
Key Diagram Summaries
7-Pin Hookup & Trailer Lighting
- Standard 7-pin flat connector:
- Brown (BR): Right turn + brake lights
- Red (R): Left turn + brake lights
- Green (GR): Tail/marker lights
- Yellow (Y): Auxiliary 12V power/charging
- White (W): Ground
- Black (BLK): Brakes (brakeaway circuit)
- Blue (BL): Electric brakes
- All 14–10 GA wires routed through frame rails to junction box.
- Breakaway switch interrupts brake power on disconnect.
- External lights: Front/side markers (amber), rear tail/turn/brake (red), license plate light.
Chassis & Breakaway Wiring
- 7-pin junction routes to battery compartment and lighting fixtures.
- Blue brake wire runs separately to breakaway switch.
- Auxiliary charging circuit (yellow) supports onboard battery charging from tow vehicle.
Interior 12V & 110V Combined Wiring
- Marine master switch isolates battery input.
- 12V circuits include:
- LED interior/exterior lights (10 A fuse)
- Water pumps (WP1/WP2, 10 A)
- Fridge socket (15 A)
- USB outlets, stereo (5 A)
- Fan, toilet vent fan (1 A)
- Heater pads, side kitchen lights, toolbox light
- 110V AC circuits:
- Shore power inlet → transfer switch → battery charger → multiple GFCI outlets
- Inverter feed (where equipped) to select outlets
- Solar panels → 40 A controller → batteries
- Fuses/breakers: 5–15 A per circuit (e.g., 15 A fridge, 10 A pump/light, 5 A stereo/TV fan).
- Ground: White/green wires to chassis points.
- Battery monitor, voltage gauge, momentary switches standard.
Troubleshooting Tips
- No 12V: Verify marine switch ON, main 50 A fuse near batteries, breaker panel (under bed or galley).
- No shore power: Confirm transfer switch position, incoming 30 A cord, GFCI reset.
- Specific circuit failure: Check labeled fuse (e.g., pump only → 10 A WP fuse).
- Test points: 12.6–14.4 V DC at batteries (engine running or solar), 110–120 V AC at outlets when shore connected.
Safety Notes
- Disconnect shore power and battery negative before inspection.
- Annual certified inspection required for warranty.
- All non-current-carrying metal must remain grounded.
