A seven-way RV blade connection carries trailer lighting, electric-brake control, auxiliary 12V power and ground between the tow vehicle and the trailer. The trailer-side plug and vehicle-side socket are different parts. CURT's original guide also shows two seven-way blade colour conventions—traditional RV and SAE J2863—so connection positions and circuit tests matter more than simply matching wire colours.
Select the exact plug, socket or mounting accessory
| CURT part | Which side? | What it includes |
|---|---|---|
| 58141 | Trailer-side male RV blade plug | Black plastic 7-way connector with concealed terminals; wires not included |
| 58145 | Trailer-side male RV blade plug | Heavy-duty molded version with ergonomic grip; wires not included |
| 58150 | Vehicle-side female RV blade socket | Black plastic socket with spring-loaded protective cover |
| 58151 | Vehicle-side female RV blade socket | Packaged version with spring-loaded protective cover |
| 58291 | Vehicle-side socket mounting | Black steel bracket, manufacturer lists compatibility with CURT 58150 and 58220 |
| 57015 | Vehicle-side USCAR replacement | Factory USCAR input and separate 7-way RV blade plus 4-way flat outputs |
CURT traditional versus SAE seven-way blade colours
| Circuit function | Traditional RV blade | SAE J2863 blade |
|---|---|---|
| Tail / running lights | Green | Brown |
| Left turn and stop | Red | Yellow |
| Ground | White | White |
| Electric trailer brakes | Blue | Blue |
| Right turn and stop | Brown | Green |
| Auxiliary +12V feed | Black | Orange |
| Reverse / backup lights | Yellow | Grey |
Connector checks before attaching wires
| Check | Why it matters |
|---|---|
| Vehicle socket versus trailer plug | The CURT diagram gives a different rear view for each; do not mirror the connector positions. |
| Traditional versus SAE | The manufacturer uses different wire colours for the same circuits; identify the actual terminals. |
| 7-way RV blade versus round pin | A 7-way round-pin connector is not electrically or mechanically the same as an RV blade format. |
| 12V auxiliary power | The battery-feed circuit must exist, be protected and be tested rather than inferred from the presence of a 7-way socket. |
| Electric brakes | The tow vehicle needs the correct electric brake-controller connection and output wiring. |
| Mounting bracket | CURT 58291 is specified for sockets 58150 and 58220, not every 7-way housing. |
| USCAR replacement 57015 | Needs the correct factory USCAR connection; the socket does not create missing brake or 12V feed circuits. |
Original manufacturer wiring illustration
CURT illustrated rear views of traditional and SAE seven-way RV blade plugs and sockets. Open the PDF to enlarge the original front/rear-view diagram, rather than relying on a generic pinout drawing.
Open the illustrated CURT connector wiring guide (PDF, page 9)
Before ordering or installation
Use the manufacturer's original terminal diagram and a circuit tester before making or repairing a towing connection. Confirm which view is shown—trailer-side plug or vehicle-side socket—and verify each function rather than trusting colour alone. Do not tie the auxiliary-power and brake-control conductors together. Disconnect electrical power before re-terminating wiring and check the completed trailer functions before towing.
Related RV and trailer parts guides
Compare actual products available from NewRVParts
Each photo leads to the exact corresponding store listing. Identify the part number before choosing a replacement.
58141 — CURT Trailer-Side 7-Way RV Blade Plug7-way trailer plug with concealed wire terminals
58145 — CURT Heavy-Duty 7-Way RV Blade Trailer PlugTrailer-side male plug with molded ergonomic grip
58150 — CURT Vehicle-Side 7-Way RV Blade SocketVehicle-side socket with spring-loaded dust cover
58151 — CURT Packaged 7-Way RV Blade Vehicle SocketPackaged vehicle-side socket with spring cover
58291 — CURT Black Steel 7-Way Socket Mounting BracketBracket fits specified CURT 58150 and 58220 sockets
57015 — CURT USCAR 7-Way and 4-Way Vehicle ConnectorPlug-in replacement for a matching factory USCAR harness