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Warranty: One-Year Limited Warranty
Output Type: 4-Way Flat
Tail Light Circuits: 5.0 Amps Per Circuit
Turn and Brake Circuits: 3.0 Amps Per Circuit
Installation Time Exact (Minutes): 0
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. 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 888-634-9494The Curt 59187 is a Standard Duty Powered Tail Light Converter with Surface Mount Technology (SMT) that converts vehicle taillight signals (left turn, right turn, tail, and stop lights) to power a trailer's lighting system. It connects to your vehicle's existing taillight wiring and outputs a 4-flat connector for trailer use.
The converter system is designed for 12-volt negative ground systems only. It will not function on positive ground or 24-volt systems.
Yes, the converter can be used with a 2-wire system, but the red wire (brake signal) must be attached to ground instead of to a separate brake signal wire.
You will need a test light to identify the taillight wires in your vehicle's harness, a drill with a 3/32" bit to create the ground eyelet mounting hole, and a wrench or socket to secure the ground screw. The manual does not specify whether additional tools such as wire strippers or crimpers are required.
The kit includes the converter module, a wiring harness with colour-coded wires (red, yellow, brown, green), a white ground wire with ring terminal, a ground screw and eyelet, a fuse holder with 10 amp fuse, double-sided tape for mounting, cable ties for securing wires, and a butt connector for the power wire.
Yes. Step 3 requires you to temporarily disconnect the negative battery cable from the vehicle's battery before attaching the converter wires. The negative cable is reinstalled after the converter wires are secured in Step 7.
Use a test light to probe the wires in your vehicle's taillight harness. Figure 1 in the manual shows typical locations where you can access these wires based on your vehicle type (behind driver's or passenger's side tail light housing, rear bumper, or rear access panel). Activate each light function on your vehicle one at a time and note which wire the test light illuminates for each function.
Mount the converter on the driver side of your vehicle in an accessible location. If mounting outside the passenger cabin, choose a clean surface that is out of the path of road spray and debris from the rear wheels. The converter is mounted using the double-sided tape provided.
The converter uses insulation-piercing wire taps. Insert the vehicle's taillight wires (identified in Step 2) into the corresponding input terminals on the converter. Match each wire to its function: yellow for left turn, green for right turn, brown for tail light, and red for brake/stop light. With wires fully inserted, push the insulation piercing gate down to complete the connection. Close the cover.
Red wire = brake signal; Yellow wire = left turn signal; Brown wire = tail light signal; Green wire = right turn signal. These colours correspond to the vehicle's taillight wires you identify with the test light.
Locate a suitable mounting location on the vehicle's frame or cross member near the converter. Remove any debris or undercoating to expose clean metal. Drill a 3/32" hole. Attach the white ground wire using the ring terminal, ground screw, and eyelet provided with the kit.
Yes. You must drill a 3/32" hole in the vehicle's frame or cross member to mount the ground eyelet for the white ground wire. Before drilling, verify that miscellaneous items (wiring, fuel lines, brake lines, etc.) are not hidden behind or under the surface to avoid damage to the vehicle or personal injury.
When passing the 12 GA. power wire through sheet metal, use an existing grommet, add a new grommet, or use silicone to protect the wire from sharp edges. This prevents the wire insulation from being damaged and causing electrical shorts or fire hazards.
The power wire must be 12 GA. (gauge) or larger. This wire routes from the vehicle battery to the converter and is secured to the vehicle chassis using cable ties provided.
The converter uses a 10 amp fuse as the maximum rating. The fuse holder with 10 amp fuse is included in the kit and must be installed after all other installation steps are completed.
Drill a 3/32" hole in the vehicle's frame or cross member to mount the ground eyelet for the white ground wire.
Route a 12 GA. wire or larger from the vehicle battery positive (+) terminal to the converter. Use the ring terminal provided to connect to the battery. Route the wire carefully to avoid pinch points and hot or rotating components. Secure the power wire to the vehicle chassis using cable ties. When passing through sheet metal, use an existing grommet, add a grommet, or use silicone to protect the wire from sharp edges.
Install the 10 amp fuse in the fuse holder after all other installation steps have been completed. This is the final step before testing the converter.
Before drilling, verify that miscellaneous items (such as wiring, fuel lines, brake lines, or other components) are not hidden behind or under the surface where you plan to drill. Drilling into hidden items can cause damage to the vehicle and/or personal injury.
Two test methods are provided. Method 8A (using a test light): 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. Probe the three receptacles of the 4-flat end to confirm proper operation. Method 8B (using a trailer): Connect the vehicle 4-flat with trailer wiring and test using the trailer lights. Activate each light function one at a time. If trailer lights do not operate properly, disconnect the trailer and use a test light to check the vehicle 4-flat. If the vehicle 4-flat operates properly, the problem is with the trailer.
First, disconnect the trailer 4-flat connector. Using a test light, check for proper operation at the vehicle 4-flat end. If the vehicle 4-flat operates properly (test light illuminates for each light function), the problem is with the trailer or its wiring. If the vehicle 4-flat does not operate properly, the converter or its connections may not be installed correctly; review the installation steps and wire connections.
The Curt 59187 works on 12-volt negative ground vehicles with accessible taillight wiring. The manual does not list specific vehicle makes or models; contact Curt Manufacturing technical support at 1-877-287-8634 to confirm compatibility with your vehicle.
You need a test light to identify taillight wires, a drill with a 3/32" bit for the ground hole, and basic hand tools to secure the ground screw. All wiring components and fasteners are included.
Yes, temporarily disconnect the negative battery cable before wiring the converter. Reconnect it after securing the converter wires with cable ties.
Use 12 GA. wire or larger for the power connection. The converter includes a 10 amp fuse, which is the maximum rating. Install the fuse after all other steps are complete.
Red = brake signal; Yellow = left turn; Brown = tail light; Green = right turn. For 2-wire systems, attach the red wire to ground instead of a separate brake signal.
Use a test light on the vehicle 4-flat connector or connect a trailer and test each light function (left turn, right turn, tail, stop). Each should illuminate when activated on the tow vehicle.
Disconnect the trailer 4-flat connector. Using a test light, check for proper operation at the vehicle 4-flat end by activating each light function (left turn, right turn, tail, stop) and probing the receptacles. If the vehicle 4-flat operates properly, the problem is with the trailer or its wiring. If the vehicle 4-flat does not operate, verify that all converter wires are properly inserted into the insulation-piercing taps, the ground wire is securely mounted, and the fuse is installed.
Use a test light to check each wire at the vehicle 4-flat connector. Activate the corresponding light function on the tow vehicle (left turn, right turn, tail, or stop) and probe each receptacle. If the test light does not illuminate for a particular function, the corresponding vehicle taillight wire may not be properly connected to the converter, or the vehicle's taillight circuit may have a problem. Verify that the correct vehicle wire is inserted into the correct converter input terminal (yellow for left turn, green for right turn, brown for tail, red for brake).
| 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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