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Original price was $72.95. Current price is $58.99.Requires CURT powered converter wiring kit #55151 or similar
Warranty: One-Year Limited Warranty
Output Type: 4-Way Flat
Tail Light Circuits: 7.5 Amps Per Circuit
Turn and Brake Circuits: 7.5 Amps Per Circuit
Installation Difficulty: Professional
Installation Time Exact (Minutes): 60
When your vehicle does not readily provide an electrical connection for hooking up your trailer, CURT electrical converts offer the solution. Working tail lights on your trailer are absolutely essential any time you tow, and a converter provides an effective way to properly equip your vehicle for safe towing. A CURT electrical converter, much like our custom vehicle-to-trailer wiring harnesses, provides a trailer connector on your vehicle by splicing into the vehicle's electrical system. Electrical converters are designed to splice directly into the taillight wiring, rather than plugging into various sockets, giving them the nickname "taillight converters". Though it requires a little extra work compared to a custom wiring harness, a tail light converter offers a reliable, long-term connector solution. This CURT electrical converter is designed to convert a 3-wire system to a 2-wire system and provides a standard 4-way flat connector socket to plug in your trailer. It is designed to fit certain years of the Audi Q5 (except hybrid), BMW 328i xDrive sedan, BMW X5 SUV, Infiniti M37x sedan or Mercedes SLK250 (to verify your vehicle compatibility, see the CURT application guide at curtmfg.com).This converter is made with cutting-edge surface-mount technology (SMT) circuitry, featuring electrical components that are mounted directly to the surface of the board rather than being inserted into a series of holes. SMT circuits have longer life cycles, lower resistance, reduced heat generation and are more reliable than through-hole-mounted components.
CURT offers a variety of high-quality trailer hitches and accessories for select vehicle models. Find the perfect fit for your towing needs at TowUniverse.
CURT, a Lippert brand, offers a complete line of towing products and is the leading manufacturer of custom-fit trailer hitches. We offer the broadest selection of custom-fit hitches, and each one is designed, welded, and coated in Wisconsin.
CURT is also a leader in flat towing products, as well as 5th wheel, gooseneck, and weight distribution hitches, ball mounts, electrical components, cargo solutions, and other towing accessories.
For everything from passenger cars and vans to full-size pickups and SUVs, CURT is 'The First Name in Towing Products®.'
Experts available to answer your questions
Call 888-634-9494
The Curt 56190 is a tail light converter that converts your vehicle's factory taillight signals to a 4-flat trailer connector. It allows you to connect a trailer with standard 4-flat lighting to your vehicle by tapping into the vehicle's existing taillight wiring (tail lights, brake lights, left turn, and right turn circuits) and providing a powered 4-flat output connector.
The Curt 56190 converter system is designed only for 12-volt negative ground systems. It will not work on 12-volt positive ground systems or any other voltage. Verify your vehicle uses a 12-volt negative ground system before purchasing.
The Curt 56190 is designed for vehicles with accessible taillight wiring. The manual lists typical taillight wiring locations behind driver's and passenger's side tail light housings, rear access panels, and rear bumpers. If your vehicle's taillight wiring is not accessible in these locations or uses a multiplexed or integrated lighting system, the converter may not be suitable. Consult the manufacturer or a professional installer if you cannot locate your vehicle's taillight wiring in the typical locations shown.
You will need: a test lamp or circuit tester to identify the taillight wiring circuits; wire taps to splice into the vehicle's harness; cable ties to secure the converter wires; a drill with a 3/32" bit to create the ground hole; and a screwdriver to install the ground screw. The converter comes with the ground screw, eyelet, double-sided tape for mounting, and a fuse holder with 10 AMP fuse.
The Curt 56190 includes: a ground screw and eyelet for the white ground wire; double-sided tape for mounting the converter module; a fuse holder with a 10 AMP fuse maximum; and wire taps for splicing into the vehicle's taillight harness. The converter has five wires (brown, yellow, red, green, white) and a 4-flat connector output.
Yes. You must temporarily remove the vehicle's negative battery cable from the battery before wiring the power supply. This is a safety requirement to prevent electrical shock or short circuits during installation. Reconnect the negative battery cable after securing the converter wires with cable ties.
Use a test lamp to identify the wires in your vehicle's taillight harness. Activate each light function (left turn, right turn, tail lights, and brake lights) one at a time and probe the harness wires to find which wire corresponds to each function. The manual lists typical taillight wiring locations behind tail light housings, rear access panels, and rear bumpers depending on your vehicle type.
The Curt 56190 has five input wires that connect to your vehicle's taillight harness: Brown wire connects to the Tail Light Circuit; Yellow wire connects to the Left Turn Circuit; Red wire connects to the Brake Light Circuit; Green wire connects to the Right Turn Circuit; and White wire is the Ground connection. The converter outputs a 4-flat connector for the trailer.
Use wire taps to attach each converter input wire to the corresponding vehicle harness wire you identified with the test lamp: Brown to Tail Light, Yellow to Left Turn, Red to Brake Light, and Green to Right Turn. Push the metal lock down on each wire tap when the wires are fully inserted to secure the connection.
Locate a clean, accessible mounting location for the converter module. If mounting outside the vehicle cabin, choose a clean surface that is out of the path of spray and debris from the rear wheels and road surface. The manual recommends placing the converter on the driver's side of the vehicle. Mount it using the double-sided tape provided.
Yes. You must drill a 3/32" hole in a clean metal surface on the vehicle's frame or cross member near the converter location. This hole is for mounting the ground eyelet and white ground wire. Before drilling, verify that no miscellaneous items (wiring, fuel lines, brake lines, etc.) are hidden behind or under the surface to avoid damage to the vehicle or personal injury.
Drill a 3/32" hole in a clean metal surface on the vehicle's frame or cross member. Remove any debris or undercoating to expose clean bare metal before drilling. This hole is for the ground screw and eyelet that secure the white ground wire.
Mount the white ground wire using the ground screw and eyelet provided. Drill a 3/32" hole in a clean metal surface on the vehicle's frame or cross member near the converter. Remove any debris or undercoating to expose clean bare metal. Insert the eyelet through the hole and secure it with the ground screw.
Route the 12 GA black power wire to the vehicle battery location, making sure to avoid any pinch points. The battery location may differ depending on your vehicle. Install the fuse holder with 10 AMP fuse maximum after all other installation steps have been completed. Use a ring terminal for the battery connection.
Place the converter on the driver's side of the vehicle and route the green wire (Right Turn Signal) to the passenger side of the vehicle to reach the passenger-side turn signal circuit.
The Curt 56190 uses a fuse holder with a 10 AMP fuse maximum. Install the fuse after all other installation steps have been completed. Do not use a fuse larger than 10 AMP.
If using the Curt 56190 converter as a powered module for a 2-wire system, the red stop wire must be grounded. This allows the converter to power the brake light function without a separate brake light wire from the vehicle.
Before drilling, verify that no miscellaneous items (wiring, fuel lines, brake lines, etc.) are hidden behind or under any surface to avoid damage to the vehicle and/or personal injury. Disconnect the negative battery cable before wiring the power supply to prevent electrical shock or short circuits.
Test the converter using either a circuit tester or a trailer. With a circuit tester: attach the ground lead to the exposed ground terminal of the 4-flat end, activate the tow vehicle's left turn, right turn, tail, and stop lights one at a time, and probe the three receptacles of the 4-flat end to confirm proper functionality. With a trailer: mate the 4-flat with the trailer and run the same test using the trailer lights. If a trailer light function does not work, disconnect the trailer 4-flat, turn vehicle functions off, and recheck with a circuit tester. If the circuit tester shows the function is good, the problem is with the trailer, not the converter.
First, disconnect the trailer 4-flat connector and turn off the vehicle light functions. Use a circuit tester to recheck the function at the 4-flat end of the converter. If the circuit tester shows the function is working properly, the problem is with the trailer, not the converter. If the function is not working on the circuit tester, there is an issue with the converter installation or wiring.
The Curt 56190 works on 12-volt negative ground vehicles with accessible taillight wiring behind tail light housings, rear access panels, or rear bumpers. It does not work on 12-volt positive ground systems. Verify your vehicle's electrical system and that you can access the taillight wiring before purchasing.
Yes, you must temporarily disconnect the negative battery cable before wiring the power supply. Reconnect it after securing the converter wires with cable ties.
Yes. You must drill a 3/32" hole in a clean metal surface on the vehicle's frame or cross member for the ground connection. Before drilling, verify that no hidden items (wiring, fuel lines, etc.) are behind or under the surface.
The Curt 56190 uses a 10 AMP fuse maximum. Install the fuse holder after all other installation steps are complete.
Before drilling, verify no hidden items (wiring, fuel lines, brake lines) are behind or under the surface. Disconnect the negative battery cable before wiring the power supply to prevent electrical shock.
Disconnect the trailer 4-flat connector and turn off the vehicle light functions. Use a circuit tester: attach the ground lead to the exposed ground terminal of the 4-flat end and probe the three receptacles while activating the vehicle light function. If the circuit tester shows the function is working, the problem is with the trailer. If the function does not work on the circuit tester, there is an issue with the converter installation or wiring that needs to be corrected.
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| Kit # | Pkg # | Bulk # | 30-Pack# | Powered | Circuit-Protected | Signal Circuit | Taillight Circuit | SMT |
|---|---|---|---|---|---|---|---|---|
| 59496 | 56496 | -- | 56497 | Yes | Yes | 3.0 amps | 6.0 amps | Yes |
| -- | 56130 | -- | -- | -- | -- | 3.0 amps | 5.0 amps | Yes |
| -- | 56175 | -- | -- | Yes | Yes | 3.0 amps | 5.0 amps | Yes |
| 59187 | 56187 | -- | -- | -- | Yes | 3.0 amps | 5.0 amps | Yes |
| 59190 | 56190 | -- | -- | Yes | -- | 7.5 amps | 7.5 amps | Yes |
| -- | -- | 58240 | -- | -- | -- | 2.1 amps | 5.0 amps | Yes |
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