Trailer Wiring, Plugs & Sockets

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.
5-WIRE systems provide all the color coded functions of the 4-pole systems plus an additional blue wire which may be used for Hydraulic disc brakes or auxiliary lights.
6-WIRE systems provide all the color-coded functions of the 4-pole systems plus two additional poles for 12-volt feed (red wire) and suppl (blue wire) to Electric brake systems.
7-WIRE systems provide all the color-coded functions of the 6-pole systems plus an additional pole for interior/exterior lighting. 7-wire systems are most commonly found on RV & Cargo trailers.
Tail Light Converters are necessary for adapting import and domestic vehicles with separate turn and stop lights (3-wire system) to standard trailer tail light wiring (2-wire system). Always consult the vehicle owner's manual when considering trailer wiring.
Click here to see a 4-pole system color coded trailer wiring diagram
| Quantity | Description | Price | |
|---|---|---|---|
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100' Spool 4-Way 16/18 Gauge Bonded Trailer Wire #49955
Stock# 5177122 |
$41.50
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4-Wire x 25' Split Trailer Harness Kit #V5425Y
Stock# 5005198 |
$16.99
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5-Wire x 25' Split Trailer Harness Kit #V5525Y
Stock# 5005031 |
$20.88
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Flat 4-Prong Trailer Connector Plug #V5400A
Stock# 5005089 |
$4.49
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Flat 4-Prong Trunk Connector Plug #V5400B
Stock# 5005090 |
$5.79
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Endurance 4 Flat Trailer Plug #48110Stock# 5177132 |
$5.99
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100' ABS Green Lectraflex 7 Conductor Wire #3-327
Stock# 1566189 |
$299.00
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Endurance 4 Flat Trunk Connector #48030Stock# 5177135 |
$6.99
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Flat 4-Prong Vehicle Knockout Adapter #47605
Stock# 5177053 |
Regular Price: $5.99 Special Price: $3.99 |
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Flat 4-Prong 48" Wiring Extension #47115
Stock# 5177024 |
$8.39
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18" 4-Flat Plug Extension w/ Wire Taps #118185
Stock# 5223292 |
$6.50
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Flat 4-Prong Tail Light Converter #V5410
Stock# 5005005 |
$16.99
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Round 4-Pole Truck & Trailer Connector Set #5404
Stock# 5005023 |
$11.95
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Flat 5-Plug Trailer Connector Plug #V5500A
Stock# 5005027 |
$6.79
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5-Flat Connector Cover #20118
Stock# 5223291 |
$2.49
|
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Flat 5-Plug Trunk Connector Plug #V5500B
Stock# 5005028 |
$7.79
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Flat 5-Prong 18" Wiring Extension #TC51000
Stock# 5023232 |
$11.50
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Square 6-Plug Trunk Connector Set #47995
Stock# 5177061 |
$5.77
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Round 6-Pole Trailer End Connector #48445Stock# 5177030 |
$6.29
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Round 6-Pole Trailer End Electric Plug & 6' Cable
Stock# 5177087 |
$25.75
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Round 6-Pole Vehicle End Plastic Socket #48425Stock# 5177013 |
$6.29
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Round 6-Pole Vehicle End Metal Socket #18036Stock# 5223230 |
$12.99
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Endurance 7-Pole RV Blade Trailer End Plug #48510Stock# 5177133 |
$11.77
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7-Pole RV Blade Trailer End Plug #48505Stock# 5177029 |
$8.39
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7-Pole RV Blade Trailer End Plug & 3' Cable
Stock# 5177089 |
$20.95
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7-Pole RV Blade Trailer End Plug & 6' Cable
Stock# 5177090 |
$29.99
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7-Pole RV Blade Trailer End Plug & 11' Cable
Stock# 5177091 |
$37.50
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Endurance 7-Pole RV Blade Vehicle End Socket #48480Stock# 5177131 |
$12.49
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7-Pole RV Blade Vehicle End Socket #48485Stock# 5177007 |
$9.44
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7-Pole Vehicle to 7-Pole Trailer Extension Cable - 7' #118664
Stock# 5223024 |
$48.95
|
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7-Pole Trailer Wiring Harness Kit - 4' Cable #20224
Stock# 5223026 |
$66.50
|
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Hoppy Fifth Wheel or Gooseneck Wiring Harness, #41157Stock# 5177130 |
$63.79
|
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Fifth Wheel or Gooseneck Wiring Harness, #5197410
Stock# 5223284 |
$74.95
|
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Fifth Wheel or Gooseneck Wiring Harness, #5197411
Stock# 5223285 |
$69.95
|
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4-Way Flat Connector Mounting Bracket #18144Stock# 5223194 |
$6.59
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4, 5 & 6-Way Trunk Connector Bracket #18137Stock# 5223192 |
$8.99
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7-Way Round Trunk Connector Mounting Bracket #118138Stock# 5223193 |
$8.99
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4-Flat Connector Storage Box #18145
Stock# 5223016 |
$9.50
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4-Flat Connector Cover with LED Tester #118147Stock# 5223322 |
$2.95
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6 & 7-Way Connector Mounting Box #18156Stock# 5223203 |
$12.99
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6 & 7-Way Connector Mounting Box #18159Stock# 5223246 |
$12.99
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4, 5, & 6-Pole Trunk Connector Bracket #48605
Stock# 5177067 |
$5.25
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Marker Light 2-Pole Plug #142-49
Stock# 5005131 |
$2.45
|
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Tail Light 3-pole Harness Plug #431-491
Stock# 5005139 |
$3.19
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OPTRONICS Marker Light Inline 2-Pole Plug
Stock# 1294151 |
$3.50
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OPTRONICS Marker Light Offset 2-Pole Plug
Stock# 1294152 |
$3.99
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OPTRONICS Tail Light Straight 3-Pole Plug
Stock# 1294153 |
$3.50
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OPTRONICS Tail Light Right-Angle 3-Pole Plug
Stock# 1294154 |
$3.99
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OPTRONICS Marker Light 1-Pole Plug, A65P
Stock# 1294155 |
$3.89
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TRUCK-LITE Marker Light 2-Pole Plug #94902
Stock# 1569016 |
$2.49
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TRUCK-LITE Fit 'N Forget Rear Sidemarker PlugStock# 1569176 |
$3.69
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TRUCK-LITE Fit 'N Forget CHMSL Plug #95033Stock# 1569175 |
$3.69
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TRUCK-LITE 8" Fit 'N Forget Stop/Turn/Tail Plug #94707
Stock# 1569172 |
$3.99
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TRUCK-LITE Fit 'N Forget Stop/Turn/Tail AdapterStock# 1569171 |
Regular Price: $5.88 Special Price: $3.99 |
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TRUCK-LITE 4" LED Fit 'N Forget M/C Adapter Plug #93745
Stock# 1569179 |
$5.40
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TRUCK-LITE 6" Right Angle Marker Plug #94964
Stock# 1569180 |
$3.75
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50' ABS Green Lectraflex 7 Conductor Wire #3-326
Stock# 1566188 |
$158.50
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50' Black Duraflex 7 Conductor Wire #3-241
Stock# 1566190 |
$68.75
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100' Black Duraflex 7 Conductor Wire #3-242
Stock# 1566191 |
$132.50
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50' Black Duraflex 6 Conductor Wire #3-201
Stock# 1566192 |
$63.75
|
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100' Black Duraflex 6 Conductor Wire #3-202
Stock# 1566193 |
$113.75
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50' Black Duraflex 4 Conductor Wire #3-191
Stock# 1566194 |
$41.50
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100' Spool 12 Ga. Primary Wire
Phillips 12 ga Primary wire. |
$29.50
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100' Spool 10-2 AWG Primary Wire #2-404
Stock# 1566285 |
$133.00
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100' Spool 14-4 AWG Primary Wire #2-425
Stock# 1566289 |
$123.50
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100' Spool 16-2 AWG Primary Wire #2-401
Stock# 1566282 |
$35.99
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100' Spool 16-3 AWG Primary Wire #2-422
Stock# 1566286 |
$59.95
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100' Spool 12-3 AWG Primary Wire #2-426Stock# 1566290 |
$129.00
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100' Spool 16 Ga. Primary Wire
Phillips 16 ga Primary wire. |
$13.50
|
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100' Spool 14-2 AWG Primary Wire #2-402
Stock# 1566283 |
$54.00
|
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100' Spool 16-4 AWG Primary Wire #2-423
Stock# 1566287 |
$123.00
|
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100' Black Duraflex 4 Conductor Wire #3-192
Stock# 1566195 |
$85.00
|
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100' Spool 14 Ga. Primary Wire
Phillips 14 ga Primary wire. |
$17.99
|
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100' Spool 12-2 AWG Primary Wire #2-403
Stock# 1566284 |
$75.00
|
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100' Spool 14-3 AWG Primary Wire #2-424
Stock# 1566288 |
$72.50
|
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Dielectric Waterproof Connector Grease #11755
Stock# 5135035 |
$5.99
|
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Deluxe Connector Cleaner #11000Stock# 1623429 |
$8.39
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