Trailer wiring and harness plugs are available in a variety of sizes and configurations. The most basic of designs is the color coded 4-WIRE system which uses a brown wire for tail, license, and side marker lights, yellow wire for left hand stop and turn, green wire for right hand stop and turn, and white wire for system ground. The "Flat-4" harness plug is found on almost all boat trailers and many smaller utility trailers that do not have brakes.
Stock# 1326901 2 pole male trailer end plug is a heavy duty upgrade to any factory end plug. Installs easily with trailer wires. SUPPLIES LIMITED - 3 left in stock
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# 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# 5291239 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# 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# 5177138 Endurance™ Quick Fix ™ 4-Flat Trailer connector combines the Endurance professional grade with the ease and speed of the Quick-Fix 4-flat for a simple repair.
Stock# 5223340 Commonly found on trailers with just lights and no other electrical components. The 4-Flat plug comes pre-wired with a 4-strand color-coded jacketed trailer wire harness 4' long.
Stock# 5223341 Commonly found on trailers with just lights and no other electrical components. The 4-Flat plug comes pre-wired with a 4-strand color-coded jacketed trailer wire harness 8' long.
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.
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# 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# 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# 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# 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# 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# 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.
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# 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# 1569172 TRUCK-LITE #94707 LED Fit 'N Forget stop/turn/tail plug keeps water salt and corrosives from LED lamps. Features 8 inch 16 gauge GPT wire.
Stock# 1569179 TRUCK-LITE #93745 LED Fit 'N Forget marker/clearance adapter plug is used to adapt LED lamps to conventional plug harness systems. Features 4" 16 gauge GPT wire.
Stock# 1566189 PHILLIPS 7-conductor 100' spool - 1/8, 2/10, 4/12 Ga. ABS Bright Green Black - Brown - Blue - Green - Red - White - Yellow SUPPLIES LIMITED - 2 left in stock
Stock# 1566454 Phillip 7 conductor 100' spool - 1/10, 6/12 GA Blue Jacket .640 O.D. Black - Brown - Blue - Green - Red - White - Yellow SUPPLIES LIMITED - 2 left in stock
Stock# 1566456 PHILLIPS 6 conductor 100' spool - 6/14 GA Blue Jacket .570 O.D. Black - Brown - Green - Red - White - Yellow SUPPLIES LIMITED - 1 left in stock
Stock# 1566488 PHILLIPS 7-conductor 250' spool - 1/12, 6/14 GA Blue Jacket .570 O.D. Black - Brown - Blue - Green - Red - White - Yellow SUPPLIES LIMITED - 2 left in stock
Stock# 1566190 PHLLIPS 7-conductor 50' spool - 6/14, 1/12 gauge with .570" O.D. black jacket Duraflex wire. Black - Brown - Blue - Green - Red - White - Yellow
Stock# 1566461 PHILLIPS 7-conductor 50' spool - 6/12, 1/10 gauge with .640" O.D. black jacket Duraflex wire. Black - Brown - Blue - Green - Red - White - Yellow
Stock# 1566191 PHILLIPS 7-conductor 100' spool - 6/14, 1/12 gauge with .570" O.D. black jacket Duraflex wire. Black - Brown - Blue - Green - Red - White - Yellow
Stock# 1566460 Phillips 7 conductor 100' spool - 6/12, 1/10 gauge with .640" O.D. black jacket Duraflex wire. Black - Brown - Blue - Green - Red - White - Yellow SUPPLIES LIMITED
Stock# 1566493 Phillips 7 conductor 250' spool - 6/12, 1/10 gauge with .640" O.D. black jacket Duraflex wire. Black - Brown - Blue - Green - Red - White - Yellow SUPPLIES LIMITED
Stock# 1566192 PHILLIPS 6-conductor 50' spool - 6/14 gauge with .550" O.D. black jacket Duraflex wire. Black - Brown - Green - Red - White - Yellow SUPPLIES LIMITED - 2 left in stock