Trailer Wiring, Plugs and Sockets

Stock# 7003260
CURT electrical adapter 57020 is designed to be a perfect OEM replacement, providing a 4-way flat socket and 7-way RV blade socket to accept either trailer plug type. It features a USCAR base to connect to any standard USCAR plug.

Stock# 1672141
TecNiq Marker Light 90 Degree 2-Pole Sure-Seal Blade Style Plug lead with a #6 ring terminal on the ground wire, hot wire features a .180" bullet style connector. Desigened to be used with T35 series Tecniq brand lights.

Stock# 1672140
TecNiq Marker Light 90 Degree 2-Pole Plug 16" lead with a #6 ring terminal on the ground wire, hot wire is stripped. Desigened to be used with T12 series Tecniq brand lights.

Stock# 1672139
TecNiq Marker Light 90 Degree 2-Pole Plug 6" lead with a #6 ring terminal on the ground wire, hot wire is stripped. Desigened to be used with T12 series Tecniq brand lights.

Stock# 7003253
CURT electrical adapter 57004 is designed to adapt a 7-way RV blade vehicle socket to fit a 4-way OR 5-way flat plug on a trailer WITH LED lights.

Stock# 7003252
CURT connector is a heavy-duty 7-way RV blade plug and is designed to mount on the trailer-side of the connection, to plug into a vehicle socket. This trailer wiring connector is especially built to withstand the elements.

Stock# 7003251
CURT set of 4-way flat dust covers features durable black rubber construction to easily resist the elements and maintain good connectivity.

Stock# 7003250
CURT 6-way round connector is designed to supply power for tail lights, turn signals, electric trailer brakes, a 12-volt battery and brake lights, as well as a ground connection. 6-way round connectors are commonly used on livestock trailers, boat trailers and utility trailers.

Stock# 7003249
CURT custom wiring connector (sometimes called a T-connector) is a simple, plug-and-play electrical device that eliminates the need for cutting, splicing and soldering when installing vehicle-to-trailer wiring. It plugs into an OEM connector and offers a 4-way flat and 7-way RV blade connector.

Stock# 7003248
CURT 4-way flat connector is designed to supply power for tail lights, turn signals and brake lights, as well as a ground connection. It features durable rubber-molded construction and is made with 12" of standard color-coded, bonded loop wire.

Stock# 7003247
CURT 4-way flat connector is designed to supply power for tail lights, turn signals and brake lights, as well as a ground connection. It features durable rubber-molded construction and is made with 72" of standard color-coded, bonded loop wire.

Stock# 7003246
CURT 7-way round connector is a female-end socket, specifically designed for the vehicle side of the connection. 7-way round RV blade connector is designed to supply power for tail lights, turn signals, electric trailer brakes, a 12-volt battery, reverse lights and brake lights, as well as a ground connection.

Stock# 7003245
CURT electrical adapter is designed to adapt a 7-way RV blade vehicle socket to fit a 5-way flat trailer plug. It features quality plastic construction and requires no splicing.

Stock# 7003244
CURT 7-way RV blade replacement harness is designed to replace an existing 7-way plug on your trailer and supply power for tail lights, turn signals, electric trailer brakes, a 12-volt battery, reverse lights and brake lights, as well as a ground connection.

Stock# 7003242
CURT 7-way round connector is a female-end socket, specifically designed for the vehicle side of the connection. 7-way round RV blade connector is designed to supply power for tail lights, turn signals, electric trailer brakes, a 12-volt battery, reverse lights and brake lights, as well as a ground connection.

Stock# 7003241
CURT 7-way RV blade replacement harness is designed to replace an existing 7-way plug on your trailer and supply power for tail lights, turn signals, electric trailer brakes, a 12-volt battery, reverse lights and brake lights, as well as a ground connection.

Stock# 7003243
CURT electrical adapter is designed to adapt a 7-way RV blade vehicle socket to fit a 4-way flat trailer plug. It features quality plastic construction and requires no splicing.

Stock# 7003239
CURT 7-way round RV blade connector is designed to supply power for tail lights, turn signals, electric trailer brakes, a 12-volt battery, reverse lights and brake lights, as well as a ground connection

Stock# 1672134
Tecniq 4-way flat connector is a male-end plug, specifically designed for the trailer side of the connection. It is compatible with all 2-wire vehicle systems.

Stock# 1672133
Tecniq 4-way flat connector is a male-end plug, specifically designed for the trailer side of the connection. It is compatible with all 2-wire vehicle systems.

Stock# 1672132
TecNiq Straight Y Style Plug lead has 3 wires that are stripped. Color Code: White - Ground, Brown, Yellow.

Stock# 1672131
TecNiq Tail Light Straight Amp Style Plug lead with a #6 ring terminal on the ground wire, hot wires are stripped. Includes 12" red/black/white wire lead.

Stock# 1672130
TecNiq Tail Light 90 Degree 3-Pole Plug lead with a #6 ring terminal on the ground wire, hot wires are stripped. Color Code: White - Ground, Red - Stop/Turn, Black - Tail/Running.

Stock# 1672129
TecNiq Tail Light Straight 3-Pole Plug lead with a #6 ring terminal on the ground wire, hot wires are stripped. Includes 12" red/black/white wire lead.

Stock# 1294426
Optronics surface mount retaining clip for A57CCB 7-way plugs.

Stock# 7003224
CURT connector testers are great for testing tail lights, turn signals, brake lights, ground connections and other electrical components on your vehicle.

Stock# 5422314
Shoreland'r #5110403 Left Hand trailer wiring harness measure 20 feet long and features two single female bullet plugs on one end with a single male bullet plug on the other end and 2 x double bullet plugs on each end.

Stock# 5422313
Shoreland'r #5110402 Right Hand trailer wiring harness measure 20 feet long and features a single female bullet plug on one end with a single male bullet plug on the other end and 2 x double bullet plugs on each end.

Stock# 5422312
Shoreland'r #5110349 4-Flat trailer wiring harness measure 7 feet long and features a ring terminated ground and 2 x double bullet plugs.

Stock# 1326900
BUYERS PRODUCTS 2-pole male trailer end plug is a heavy duty upgrade to any factory end plug. Installs easily with trailer wires.

Stock# 1326898
2 pole female vehicle end socket is a heavy duty upgrade to any factory end socket. Mounts easily under vehicle with included bracket.

Stock# 1326899
2 pole female vehicle end socket is a heavy duty upgrade to any factory end socket. Mounts easily under vehicle with included bracket.

Stock# 5005198
25' split four conductor harness & flat 4-pole trunk connector.

Stock# 5430076
ROAD KING 40' split four conductor harness & flat 4-pole trunk connector. Designed to split at the trailer tongue and run down each side of the frame.

Stock# 5005089
Peterson replacement flat 4-pole trailer plug with 12" color-coded lead wires.

Stock# 5005090
Tow Vehicle flat 4-pole trunk connector with 12" color-coded lead wires.

Stock# 7003190
Curt 4-way flat connector is a male-end plug, specifically designed for the trailer side of the connection. It is compatible with all 2-wire vehicle systems.

Stock# 5177160
This bracket allows you to mount a 4-flat connector out of harm's way. The bracket folds over your connector and attaches to your vehicle bumper for a permanent/secure mount.

Stock# 5177159
The patented Mag Flat™ is a magnetic Mounting Bracket with a snap on lid to keep your 4-flat connector out the way. It's unique lightweight design will hold tight onto anything metal, so it mounts perfectly on a tow vehicle's hitch or trailer.

Stock# 5177158
Find everything you need to rewire a trailer in this kit. Ideal for Y-harness and 4-conductor wire installation. The kit comes complete with splices, a multi-purpose wire tool, 12 volt circuit tester, electric tape, grease, cable ties, ring terminals and dust cover for your 4 Flat connector.

Stock# 5177132
Endurance™ 4-Flat Trailer plug is a heavy duty upgrade to any standard 4 Flat trailer plug.

Stock# 5177135
Endurance 4-Flat Vehicle Connector is a heavy duty upgrade to any standard 4 Flat vehicle side connector.

Stock# 5177024
Extends wiring system 48" for more flexibility in electrical hook-up.

Stock# 5419229
KARAVAN 4-Flat wiring harness measures 4' long and features male bullet type connectors on the grounds.

Stock# 5291237
EZ-LOADER 24' four conductor split harness & flat 4-pole trunk connector. Designed to split at the trailer tongue and run down each side of the frame, the harness is wired with a flat 4-pole plug that has a single ground terminal at the plug. This harness includes trunk connector and color-coded wiring with weatherproof connectors.

Stock# 5291238
EZ-LOADER 24' four conductor split harness & flat 4-pole trunk connector. Designed to split at the trailer tongue and run down each side of the frame, the harness is wired with a flat 4-pole plug and has 2 ground terminals at each end. This harness includes trunk connector and color-coded wiring with weatherproof connectors.

Stock# 5419223
KARAVAN wiring harness measures 22' long and features male bullet type connectors on the grounds.

Stock# 7102052
TRITON Flat 4-Prong 10' Leader Harness has a vehicle end and trailer end to extend the connection when needed.

Stock# 5005005
Converts vehicle lighting system with a separate turn signal and brake circuit (5-wire) to the conventional trailer lighting system (4-wire). Heavy-duty 10 amp transistors prevent premature failure. Includes line tap connectors.

Stock# 1294385
OPTRONICS A760W 12v Wiring Kit features an Illuminated On/Off 20-Amp Rocker Switch, Four Terminal 20-Amp Relay,13-ft Blue, White and Black 18AWG Wires, and a 15-Amp Inline Fuse. Everything you need to install a utility or scene light from Optronics.
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Stock# 5005023
Heavy-duty connectors provide more durability than molded vinyl plugs.

Stock# 5206134
WESBAR tow vehicle flat 5-pole trunk connector with 4' color-coded lead wires.
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Stock# 5206135
WESBAR flat 5-pole trailer end connector with 18" color-coded lead wires.
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Stock# 1294350
OPTRONICS 5-way flat trailer harness plug protector protects against dirt and corrosion when plug is not in use.
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Stock# 5177186
Hopkins weatherproof dust covers are made to protect 4 flat connectors from harsh conditions. Keeping a dust cover on your connector will help prevent corrosion leading to a good quality connection when you are ready to tow.

Stock# 5421092
VENTURE 5-Flat 6' wiring extension with Male/Female plugs allows more flexibility in electrical hook-up.

Stock# 5421093
Extends wiring system 12' for more flexibility in electrical hook-up.
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Stock# 5419230
KARAVAN 5-Flat wiring harness measures 4' long and features male bullet type connectors on the grounds.

Stock# 5430077
ROAD KING 35' split five-conductor trailer wiring harness & flat 5-pole trunk connector.

Stock# 1041400
LOADRITE 35' split five-conductor harness & flat 5-pole trunk connector. "Blue" wire may be used for Hydraulic disc brakes or auxiliary lights.

Stock# 5177061
6-prong connector set used for brakes or auxiliary lighting applications. Includes male and female end plugs with 24" color coded wire.

Stock# 5177030
Provides additional circuits for electric brakes or auxiliary power lead. 6-pole round plugs are commonly used on utility and horse trailers equipped with electric brakes. Heavy-duty metal plug with plated metal contacts.

Stock# 5177087
Provides additional circuits for electric brakes or auxiliary power lead. 6-pole plug comes pre-wired with 6-strand color-coded trailer wire.

Stock# 5177013
Socket provides necessary circuits for electric brake systems or auxiliary lights. Durable plastic construction with rubber boot to cover wire connections on plated metal contacts. Spring-loaded cover keeps out road dirt when not in use.

Stock# 5177140
Provides 7 RV Blade AND 4-wire flat connection from one location. Package includes mounting bracket.

Stock# 5177133
Endurance™ 7-Pole RV Blade Trailer End Plug is a heavy duty upgrade to any factory trailer plug end plug. Comes with mounting bracket for trailer.

Stock# 5177183
The LED Nite-Glow™ feature on this 7 blade trailer connector lets you know if power is being received from the tow vehicle and allows you to see your connection in the dark. If the connector glows, you have a solid connection.

Stock# 5177182
Built-in LED lights verify lighting functions and let you know if power is being received from the tow vehicle. Separate LED lights will illuminate for each trailer function. The rotatable puck allows for multiple orientations to match the vehicle connector and keep the LED's always facing up.

Stock# 5177029
Durable plastic housing with wire grommet and nickel plated metal contacts. 7-blade connectors provide additional circuits for trailers with electric brakes and auxiliary lighting such as interior lights or a backup/reverse function.

Stock# 7003181
CURT #56080 extension plugs into the 7-way RV blade at the rear of your truck and routes to the truck bed, providing a connector that is ready to accommodate your 5th wheel or gooseneck trailer. It is designed to work with any standard 7-way RV blade connector and comes in a length of 7'.

Stock# 5177089
Commonly found on larger trailers with brakes and auxiliary lighting.  7-pole plug comes pre-wired with 7-strand color-coded trailer wire.

Stock# 5177181
The LED Test 7-blade molded sae cable is prewired and provides protection to the wires with the jacketed wire sleeving. The LED lights confirm electrical continuity exists for each tow function.

Stock# 5177157
LED Test 7 blade molded cable is prewired and provides protection to the wires with the jacketed wire sleeving. The LED lights confirm electrical continuity exists for each tow function.

Stock# 5177090
Commonly found on larger trailers with brakes and auxiliary lighting.  7-pole plug comes pre-wired with 7-strand color-coded trailer wire.

Stock# 5177091
Commonly found on larger trailers with brakes and auxiliary lighting. 7-pole plug comes pre-wired with 7-strand color-coded trailer wire.

Stock# 5177143
Commonly found on larger trailers with brakes and auxiliary lighting.  7-pole plug comes pre-wired with 7-strand auto industry color-coded trailer wire.

Stock# 5177142
Commonly found on larger trailers with brakes and auxiliary lighting.  7-pole plug comes pre-wired with 7-strand auto industry color-coded trailer wire.

Stock# 5177131
Endurance 7-Pole RV Blade Vehicle End Socket is a heavy duty upgrade to any factory end plug.

Stock# 5177184
This pre-wired OEM tow package harness replaces your damaged factory harness or allows you to retrofit any vehicle to use these current OEM and aftermarket connectors: 40920, 40930, 40940, 40950, 40955, 40965, 40974, and 40975.

Stock# 5177136
Endurance 7-Pole Twist Mount RV Blade Vehicle End Socket is a heavy duty direct replacement for certain Chevy/GM factory end plugs.

Stock# 5223345
Commonly used for larger RV trailers with brakes and auxiliary lighting. 7-pole connectors provide additional circuits for trailers with electric brakes and auxiliary lighting such as interior lights or a backup/reverse function.
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Stock# 5177007
Durable plastic housing with wire grommet and nickel plated metal contacts. 7-pole connectors provide additional circuits for trailers with electric brakes and auxiliary lighting such as interior lights or a backup/reverse function.

Stock# 1294351
OPTRONICS 7-way round trailer harness plug protector protects against dirt and corrosion when plug is not in use. 

Stock# 5223024
7-Pole vehicle end to 7-pole trailer end extension cable allows for easy hook-up of 5th wheel and gooseneck trailers - 7'
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Stock# 5177130
HOPKINS 5th Wheel/Gooseneck wiring harness is 8' long.
Compatible With: Chevy, GMC, Ford, Dodge, Nissan, and Toyota with factory wiring harness (7 RV Blade Bumper Connector).

Stock# 7003182
CURT trailer wire connector bracket is designed to hold a 4-way flat socket. It features sturdy steel construction with a black finish and can be mounted on your vehicle or trailer hitch.

Stock# 5223194
"L-Bracket" designed to securely hold flat-4 trunk connector under vehicle.
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Stock# 7003188
CURT trailer wire connector bracket is designed to hold a 7-way RV blade socket. It features sturdy steel construction and comes with slotted screw holes for flexible installation on your vehicle or trailer hitch.

Stock# 5177067
Heavy-duty "L-Bracket" mounts underneath vehicle to hold sockets. Securely mount 4, 5, & 6-pole round connectors to vehicle with this connector bracket.

Stock# 5291242
EZ-LOADER 10" long 1-way molded plug for use with trailer lights.

Stock# 5005131
Peterson mfg. 2-way molded plug for use 142, 143, 146, 150 series marker lights.

Stock# 5005055
Peterson right angle mfg. 2-way molded female plug for use with Peterson marker light series 152, 153, and 154.

Stock# 5005224
Peterson right angle mfg. 3-way molded plug for use with sealed incandescent tail lights.

Stock# 5005139
Peterson mfg. 3-way molded plug for use with #421 series flush mount tail lights.

Stock# 1294151
OPTRONICS A46PB Inline 2-way molded plug for use with marker / clearance lights. Includes 6" black/white wire lead.

Stock# 1294152
OPTRONICS A49PB Offset 2-way molded plug for use with marker / clearance lights. Includes 6" red/white wire lead.

Stock# 1294153
OPTRONICS A45PB Straight 3-way molded plug for use with tail lights. Includes 10" red/black/white wire lead.

Stock# 1294154
OPTRONICS A47PB Right-Angle 3-way molded plug for use with tail lights. Includes 10" red/black/white wire lead.

Stock# 1294245
OPTRONICS A-45PB Inline 2-way molded plug for use with marker / clearance lights. Includes 6" red/white wire lead.

Stock# 1294223
OPTRONICS AL45PWTB 3-way molded plug to a weather tight plug.  Weather tight plug is also refereed to a Fit n' Forget plug.
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