1. Wprowadzenie
This manual provides comprehensive instructions for the installation, operation, and maintenance of the Tekonsha T-One T-Connector Harness, Model 118685. This 4-way flat wiring harness is designed to provide a reliable electrical connection for trailer lighting on select Toyota Tacoma vehicles, simplifying the process by eliminating the need for cutting or splicing vehicle wires.
2. Informacje dotyczące bezpieczeństwa
Always prioritize safety during installation and operation. Failure to follow these instructions could result in property damage, injury, or death.
- Odłącz akumulator pojazdu: Before beginning any electrical work, disconnect the vehicle's negative battery terminal to prevent accidental short circuits.
- Noś sprzęt ochronny: Stosuj odpowiedni sprzęt ochrony osobistej, taki jak okulary ochronne i rękawice.
- Sprawdź zgodność: Ensure this product is compatible with your specific vehicle make, model, and year before installation.
- Profesjonalna instalacja: Jeśli masz jakiekolwiek wątpliwości, zwróć się o pomoc do wykwalifikowanego mechanika samochodowego.
- Bezpieczne okablowanie: Properly route and secure all wiring to prevent chafing, pinching, or contact with hot or moving parts.
- Połączenia testowe: After installation, thoroughly test all trailer lighting functions (turn signals, brake lights, tail lights) before towing.
3. Zawartość opakowania
Przed rozpoczęciem instalacji sprawdź, czy wszystkie komponenty są obecne:
- Tekonsha 118685: T-One T-Connector Harness, 4-Way Flat
- Installation Hardware (e.g., zip ties, fuse, connectors, ground screw)

4. Konfiguracja i instalacja
The Tekonsha T-One T-Connector Harness is designed for a straightforward, plug-and-play installation. No cutting or splicing of vehicle wires is required.
4.1 Wymagane narzędzia
- Basic hand tools (e.g., screwdriver, wrench)
- Wire crimpers (if using included terminals)
- Sprawdź lampę lub multimetr
- Dielectric grease (recommended)
4.2 Kroki instalacji
- Przygotuj pojazd: Ensure the vehicle is turned off and the parking brake is engaged. Disconnect the negative battery terminal.
- Access Tail Light Wiring: Locate and remove the tail light assemblies on your Toyota Tacoma. This typically involves removing a few screws and carefully pulling the assembly away from the vehicle body.
- Locate Vehicle Harness Connector: Behind each tail light, identify the vehicle's existing wiring harness connector.
- Podłącz łącznik T: Unplug the vehicle's harness connector. Insert the corresponding ends of the T-One T-Connector into the vehicle's harness and the tail light assembly, ensuring a secure connection. Repeat for both sides of the vehicle.
- Mount ModuLite HD Module: Find a secure, dry location within the vehicle's rear cargo area or behind the bumper to mount the ModuLite HD module. Use the provided zip ties or screws.
- Trasa przewodu zasilającego: Route the power wire (typically red) from the ModuLite HD module to the vehicle's battery. Ensure the wire is protected from heat, sharp edges, and moving parts. Use the provided inline fuse holder near the battery connection.
- Podłącz przewód uziemiający: Connect the white ground wire from the ModuLite HD module to a clean, unpainted metal surface on the vehicle chassis using the provided ring terminal and screw.
- Bezpieczne okablowanie: Use zip ties to secure all loose wiring, preventing it from hanging or interfering with other components.
- Reinstall Tail Lights: Reinstall the tail light assemblies.
- Podłącz ponownie akumulator: Ponownie podłącz ujemny zacisk akumulatora.
- System testowy: Proceed to the "Operation" section to test all trailer lighting functions.
Note: For visual guidance, refer to the installation videos provided below for similar products. While not specific to this exact model, they demonstrate the general process.
4.3 Installation Video (Similar Product)
4.4 Additional Installation Video (Similar Product)
5. Działanie
Once installed, the T-One T-Connector Harness provides a standard 4-way flat connector for your trailer's electrical system.
5.1 Connecting to a Trailer
- Ensure both the vehicle and trailer are off.
- Remove the dust cap from the 4-way flat connector on the T-One harness.
- Align the 4-way flat connector with the corresponding receptacle on your trailer and push firmly until fully seated.
- Secure any excess wiring to prevent dragging or damage.
5.2 Testing Trailer Lights
After connecting the trailer, perform the following tests:
- Tylne światła: Turn on your vehicle's headlights. The trailer's tail lights should illuminate.
- Światła stopu: Press the vehicle's brake pedal. The trailer's brake lights should illuminate.
- Lewy kierunkowskaz: Activate the vehicle's left turn signal. The trailer's left turn signal should flash.
- Prawy kierunkowskaz: Activate the vehicle's right turn signal. The trailer's right turn signal should flash.
If any lights do not function correctly, refer to the "Troubleshooting" section.
6. Konserwacja
Regular maintenance ensures the longevity and reliable performance of your T-One T-Connector Harness.
- Utrzymuj złącza w czystości: Periodically inspect the 4-way flat connector for dirt, corrosion, or debris. Clean with a wire brush or electrical contact cleaner if necessary.
- Nałóż smar dielektryczny: Apply dielectric grease to the electrical contacts of the 4-way flat connector to protect against moisture and corrosion, especially before long-term storage or in harsh weather conditions.
- Sprawdź okablowanie: Regularly check all visible wiring for signs of wear, fraying, or damage. Ensure all connections are secure and zip ties are intact.
- Przechowuj prawidłowo: When not in use, keep the 4-way flat connector covered with its dust cap to protect it from elements. Store the harness in a dry location if it is removable.
7. Rozwiązywanie Problemów
If you experience issues with your trailer lighting, follow these troubleshooting steps:
| Problem | Możliwa przyczyna | Rozwiązanie |
|---|---|---|
| No trailer lights function. |
|
|
| Specific trailer light (e.g., left turn) does not function. |
|
|
| Światła migoczą lub są słabe. |
|
|
If problems persist after following these steps, consult a professional automotive technician.
8. Specyfikacje
| Funkcja | Szczegół |
|---|---|
| Marka | Tekonsza |
| Numer modelu | 118685 |
| Typ złącza | T-one 4-way Flat |
| Tworzywo | Polichlorek winylu (PCW) |
| Pozycja Wymiary (dł. x szer. x wys.) | 11 x 7.98 x 3.12 cala |
| Waga przedmiotu | 1.75 funtów |
| Stop Light/Turn Signal Circuit Capacity | 5 Amp |
| Taillight Circuit Capacity | 7.5 Amp |
| UPC | 016118146103 |
9. Gwarancja i wsparcie
Specific warranty information for the Tekonsha T-One T-Connector Harness (Model 118685) is not provided in the available product data. For detailed warranty terms and conditions, or for technical support, please refer to the official Tekonsha webodwiedź witrynę lub skontaktuj się bezpośrednio z działem obsługi klienta.
You can often find support resources and contact information on the manufacturer's webstrona: www.tekonsha.com





