The Advanced Trailer Module (ATM) wiring harness kit from U-Haul combines lower cost, easier installation, and OEM-level functionality into a single 'smart' towing solution. It’s designed for drivers who want factory-level performance without paying dealership prices. ATM trailer wiring uses easy plug-and-play connectors that tap into factory connection points. There's no cutting or splicing, so it's a cleaner, faster installation that can be done in as little as 30 minutes! Unlike standard aftermarket wiring that only transmits basic lighting signals, the ATM trailer wiring kit communicates with your vehicle’s high-tech sensors to ensure full compatibility with modern safety systems. For example, when a trailer is connected, the ATM automatically disables rear backup sensors so that your vehicle can move normally.
This ATM4002A trailer wiring harness kit is compatible with the Hyundai Santa Cruz (2025).
The ATM series is exclusive to U-Haul, so you will not find this functionality at this low price anywhere else!
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Questions & Answers (1)
Questions & Answers
(1)
Installed this a few days ago. Lights work, but get constant error messages and warning on the dash when the 4pin is plugged in. One message keeps telling me trailer attached. At times get messages stating verious lights not working, when all are working. What needs to be done to fix this. ATM4002A.
Hello Joe, We would recommend visiting your local U-Haul center or your dealership so they can take a look at this. Thank you for your question.
The Advanced Trailer Module (ATM) wiring harness kit from U-Haul combines lower cost, easier installation, and OEM-level functionality into a single 'smart' towing solution. It’s designed for drivers who want factory-level performance without paying dealership prices. ATM trailer wiring uses easy plug-and-play connectors that tap into factory connection points. There's no cutting or splicing, so it's a cleaner, faster installation that can be done in as little as 30 minutes! Unlike standard aftermarket wiring that only transmits basic lighting signals, the ATM trailer wiring kit communicates with your vehicle’s high-tech sensors to ensure full compatibility with modern safety systems. For example, when a trailer is connected, the ATM automatically disables rear backup sensors so that your vehicle can move normally.
This ATM4002A trailer wiring harness kit is compatible with the Hyundai Santa Cruz (2025).
The ATM series is exclusive to U-Haul, so you will not find this functionality at this low price anywhere else!
Questions & Answers
(1)
Installed this a few days ago. Lights work, but get constant error messages and warning on the dash when the 4pin is plugged in. One message keeps telling me trailer attached. At times get messages stating verious lights not working, when all are working. What needs to be done to fix this. ATM4002A.
Hello Joe, We would recommend visiting your local U-Haul center or your dealership so they can take a look at this. Thank you for your question.
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Our network of friendly neighborhood delivery drivers will pickup qualifying products from your local U-Haul Store and deliver them to your door.* This service is available in most areas on our most popular products. Choose Next-Day delivery while shopping to check availability in your area.
*Delivery fee will be calculated at checkout.
Free standard shipping is available on qualifying orders $100 (USD) or more when shipped within the contiguous U.S. or on orders $150 (CAD) or more when shipped within Canada.
In-Store Pickup Savings! When you pick up your order instead of shipping it to your home, you may see additional savings as some products will be priced lower for in-store pickup.
Next-Day Delivery:
Our network of friendly neighborhood delivery drivers will pickup qualifying products from your local U-Haul Store and deliver them to your door.* This service is available in most areas on our most popular products. Choose Next-Day delivery while shopping to check availability in your area.
Free Shipping on orders over $100
Pick Up In-Store for lower prices on select items
Installed this a few days ago. Lights work, but get constant error messages and warning on the dash when the 4pin is plugged in. One message keeps telling me trailer attached. At times get messages stating verious lights not working, when all are working. What needs to be done to fix this. ATM4002A.
Hello Joe, We would recommend visiting your local U-Haul center or your dealership so they can take a look at this. Thank you for your question.