CURT 55178 Non-Powered 3-to-2-Wire Splice-in Trailer Tail Light Converter, 4-Pin Wiring HarnessCURT$14.99Out of Stock
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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 56130 is a tail light converter that adapts a vehicle's factory tail light wiring to a 4-flat trailer connector. It identifies and converts the vehicle's left turn, right turn, tail light, and brake light signals into the corresponding 4-flat connector pins, allowing you to connect a trailer with standard 4-flat lighting.
No. The Curt 56130 is designed only for 12 volt negative ground systems. It requires accessible tail light wiring behind tail light housings, rear access panels, or rear bumpers. Vehicles with multiplexed or CAN-bus lighting systems may not be compatible. Consult the manual's typical location diagrams or contact Curt Manufacturing to confirm your specific vehicle is supported.
No. The Curt 56130 is designed only for 12 volt negative ground systems. Do not use it on 24 volt vehicles or positive ground systems.
You will need: a test lamp or circuit tester to identify the vehicle's tail light wires; wire taps to splice the converter input wires to the vehicle harness; a drill with a 3/32" bit to create the ground mounting hole; and cable ties to secure the converter wires. The converter includes a ground screw, eyelet, and double-sided tape for mounting.
The Curt 56130 includes: a ground screw and eyelet for securing the white ground wire to the vehicle frame, double-sided tape for mounting the converter module, and cable ties for securing the converter wires. Wire taps are referenced in the instructions but their inclusion is not explicitly stated.
Yes. Step 3 requires you to temporarily remove the vehicle's negative battery cable from the battery before using wire taps to attach the converter input wires to the vehicle harness. Reconnect the battery cable after securing the converter wires with cable ties.
Use a test lamp to probe the wires in the tail light harness while activating each function on the vehicle: left turn, right turn, tail lights, and brake lights. The manual provides typical locations for accessing tail light wiring (behind tail light housings, rear access panels, or rear bumpers depending on vehicle type). Once identified, connect the converter's input wires to the corresponding vehicle wires using wire taps.
The Curt 56130 converter has five input wires that connect to your vehicle's tail light harness: Brown wire connects to the tail light circuit; Yellow wire connects to the left turn circuit; Red wire connects to the brake light (stop signal) circuit; Green wire connects to the right turn circuit; White wire is the ground connection. The converter outputs these signals through a 4-flat connector for the trailer.
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 converter is mounted using the double-sided tape provided. The manual recommends placing the converter on the driver's side of the vehicle and routing the green wire to the passenger side.
Use wire taps to attach the converter's input wires to the corresponding vehicle harness wires. Push the vehicle wire fully into the wire tap, then push down the metal lock to secure the connection. The converter wires are color-coded: brown to tail light, yellow to left turn, red to brake light, and green to right turn. Ensure the battery is disconnected before making these connections.
Yes. You must drill a 3/32" hole in the vehicle's frame or cross member to mount the ground eyelet. 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 and personal injury.
Drill a 3/32" hole in a clean metal surface on the vehicle's frame or cross member near the converter location. Remove any debris or undercoating to expose clean metal before drilling.
Locate a suitable mounting location for the ground eyelet on the vehicle's frame or cross member near the converter. Remove any debris or undercoating to expose clean metal, then drill a 3/32" hole. Mount the white ground wire using the ground screw and eyelet provided with the converter.
Yes. After connecting the converter input wires to the vehicle harness and mounting the converter module, secure all converter wires to the vehicle using cable ties to prevent them from moving or being damaged.
Two testing methods are provided: (1) Using a circuit tester: attach the ground lead to the exposed ground terminal of the 4-flat connector, then activate the vehicle's left turn, right turn, tail lights, and brake lights one at a time. Probe the three receptacles of the 4-flat connector to confirm proper functionality. (2) Using a trailer: connect the trailer's 4-flat connector and run the same test using the trailer lights. If a trailer light function does not work, disconnect the trailer, turn vehicle functions off, and retest with the circuit tester. If the circuit tester shows the function is good, the problem is with the trailer, not the converter.
First, disconnect the trailer's 4-flat connector and turn off the vehicle functions. Use a circuit tester: attach the ground lead to the exposed ground terminal of the 4-flat connector and probe the three receptacles while activating the vehicle's left turn, right turn, tail lights, and brake lights one at a time. If the circuit tester shows the function is working properly, the problem is with the trailer, not the converter. If the circuit tester shows the function is not working, recheck your wire connections and ensure all wires are fully inserted into the wire taps with the metal locks engaged.
The Curt 56130 works only on 12 volt negative ground vehicles with accessible tail light wiring. Check the manual's typical location diagrams to confirm your vehicle type has wiring accessible behind tail light housings, rear access panels, or rear bumpers. Contact Curt Manufacturing if your vehicle is not shown.
You need a test lamp or circuit tester, wire taps, a drill with a 3/32" bit, and cable ties. The converter includes a ground screw, eyelet, double-sided tape, and mounting hardware.
Yes. Disconnect the negative battery cable before splicing the converter wires to the vehicle harness, then reconnect it after securing the converter wires with cable ties.
Use a circuit tester to verify that the converter is receiving the correct signals from the vehicle. Attach the circuit tester ground lead to the exposed ground terminal of the 4-flat connector and probe the three receptacles while activating the vehicle's left turn, right turn, tail lights, and brake lights one at a time. If the circuit tester shows no signal, check that all converter input wires are fully inserted into the wire taps with the metal locks engaged, and that the white ground wire is securely mounted to a clean metal surface on the vehicle's frame.
Disconnect the trailer and use a circuit tester to test the converter. Attach the ground lead to the 4-flat connector's ground terminal and probe the three receptacles while activating the vehicle's left turn, right turn, tail lights, and brake lights one at a time. If the circuit tester shows the non-working function is active on the converter, the problem is with the trailer. If the circuit tester shows no signal for that function, check that the corresponding converter input wire (yellow for left turn, green for right turn, red for brake light, brown for tail light) is fully inserted into the wire tap with the metal lock engaged.
| 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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