Integrating a trailer wiring harness into your 2017 Mercedes-Benz GLA 250 might initially seem daunting, but with the right guidance, it becomes a straightforward task. This article provides a comprehensive walkthrough, focusing on using the CURT 59496 Powered 3-to-2-Wire Splice-in Trailer Tail Light Converter Kit with a 4-Pin Wiring Harness. We aim to simplify the process, ensuring a successful DIY installation while keeping SEO optimization in mind for users searching for a “2017 Benz Gla 250 Wiring Diagram”.
The CURT 59496 kit simplifies the connection process with clearly defined wires. Here’s a breakdown of the wires and their corresponding connections to your GLA 250:
- GREEN Wire: Connect to the GLA’s right turn signal wire (black and green striped wire).
- YELLOW Wire: Connect to the GLA’s left turn signal wire (black and yellow striped wire).
- BROWN Wire: Connect to the GLA’s right tail light wire (black and grey striped wire).
- RED Wire: Connect to the GLA’s right brake light wire (yellow and white striped wire).
- WHITE Wire: Connect to the GLA’s Ground (any metal screw will work).
- BLACK Wire: Connect to the GLA’s 12V power source (black and white striped wire of the rear power outlet).
Before starting the physical connections, planning and routing are crucial. Always disconnect the vehicle battery to ensure safety during the wiring process.
Step-by-Step Wiring Guide
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Routing the Green Wire (Right Turn Signal): Begin by routing the GREEN wire towards the right turn signal area of your GLA 250. This step is crucial for ensuring the right signal light of your trailer functions correctly.
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Continue Green Wire Routing: Ensure the green wire is properly routed and positioned to reach the designated connection point without being strained or exposed to potential damage.
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Connecting the Green Wire: Carefully connect the GREEN wire from the CURT kit to the black and green striped wire of your GLA 250’s right turn signal. Soldering is recommended for a durable connection, but you can use the provided hardware if preferred.
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Securing the Green Wire: After connecting, ensure the green wire is neatly tucked away and secured to prevent it from dangling or being caught. This maintains a clean and safe wiring setup.
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Yellow, Red, and Brown Wire Connections (Left Tail Light): Next, connect the YELLOW, RED, and BROWN wires to the left tail light section. Specifically, connect the YELLOW wire to the black and yellow striped wire (left turn signal), the RED wire to the yellow and white striped wire (brake light), and the BROWN wire to the black and grey striped wire (tail light).
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Ground Wire Connection: Locate a suitable metal screw for grounding and connect the WHITE wire. A solid ground connection is essential for the proper functioning of the trailer lights.
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12V Power Wire with Fuse: Connect the BLACK wire to the black and white striped wire of the rear power outlet in your GLA 250. Remember to include the provided fuse (red) between the power adapter and the black CURT power cable for safety.
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Final Wire Management: Once all connections are made and tested, neatly tuck in all the wiring and the converter box. Ensure they are out of the way and protected from trunk contents and potential damage.
Optional Permanent Routing
For those who frequently use a trailer, consider routing the wiring more permanently. While this guide shows keeping the connector in the trunk for occasional use, you can route the cable through or below the bumper for a more permanent setup. This might require additional parts and possibly drilling, so proceed with caution and ensure it’s done professionally if you’re not comfortable.
Conclusion
Installing a trailer wiring harness on your 2017 Benz GLA 250 using the CURT 59496 kit is achievable with careful wiring and following these steps. Always double-check your connections and ensure all lights are functioning correctly before towing. If you are uncertain at any point, consulting a professional mechanic is recommended to ensure safety and proper functionality. By following this “2017 benz gla 250 wiring diagram” guide, you can confidently equip your vehicle for towing needs.
