Semi Truck Hitch Wiring

Hitch Wiring
  • Truck-Lite® - 50 Series 168" 1 Plug Marker Clearance Wiring Harness
    Truck-Lite®50 Series 168" 1 Plug Marker Clearance Wiring Harness (50304)
    0
    # mpn1578788287
    Universal 50 Series 168" 1 Plug Marker Clearance Wiring Harness (50304) by Truck-Lite®. 14 Gauge. PL-10, Blunt Cut. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the utmost...
    Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments
    $27.44
  • Truck-Lite® - 50 Series 180" Driver Side 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance Breakout
    Truck-Lite®50 Series 180" Driver Side 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance Breakout (50231)
    0
    # mpn1578788283
    Universal 50 Series 180" Driver Side 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance Breakout (50231) by Truck-Lite®. 14 Gauge. Right Angle PL-3, PL-10, Ring Terminal. This product is...
    Dimension"A" indicates standard stock length harnessA range of custom length harnesses are available in 12" increments
    $83.42
  • Truck-Lite® - 50 Series 180" Passenger Side 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance Breakout
    Truck-Lite®50 Series 180" Passenger Side 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance Breakout (50230)
    0
    # mpn1578788284
    Universal 50 Series 180" Passenger Side 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance Breakout (50230) by Truck-Lite®. 14 Gauge. Right Angle PL-3, PL-10, Ring Terminal. This product...
    Dimension"A" indicates standard stock length harnessA range of custom length harnesses are available in 12" increments
    $83.42
  • Truck-Lite® - 50 Series 288" 3 Plug Identification Wiring Harness
    Truck-Lite®50 Series 288" 3 Plug Identification Wiring Harness (50301)
    0
    # mpn1578788290
    Universal 50 Series 288" 3 Plug Identification Wiring Harness (50301) by Truck-Lite®. 14 Gauge. PL-10, Blunt Cut. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the utmost...
    Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments
    $44.28
  • Truck-Lite® - 50 Series 36" 3 Plug Identification Wiring Harness
    Truck-Lite®50 Series 36" 3 Plug Identification Wiring Harness (50300)
    0
    # mpn1578788291
    Universal 50 Series 36" 3 Plug Identification Wiring Harness (50300) by Truck-Lite®. 14 Gauge. PL-10, Blunt Cut. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the utmost...
    Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments
    $21.79
  • Truck-Lite® - 50 Series 420" Driver Side 1 Plug Turn/Tail Wiring Harness
    Truck-Lite®50 Series 420" Driver Side 1 Plug Turn/Tail Wiring Harness (51345)
    0
    # mpn1578788466
    Universal 50 Series 420" Driver Side 1 Plug Turn/Tail Wiring Harness (51345) by Truck-Lite®. 14 Gauge. Fit &'N Forget S.S., Ring Terminal. This product is made from high-grade materials to meet the strictest standards of high quality....
    Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments
    $47.05
  • Truck-Lite® - 50 Series 420" Passenger Side 1 Plug Turn/Tail Wiring Harness
    Truck-Lite®50 Series 420" Passenger Side 1 Plug Turn/Tail Wiring Harness (51344)
    0
    # mpn1578788467
    Universal 50 Series 420" Passenger Side 1 Plug Turn/Tail Wiring Harness (51344) by Truck-Lite®. 14 Gauge. Fit &'N Forget S.S., Ring Terminal. This product is made from high-grade materials to meet the strictest standards of high...
    Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments
    $40.83
  • Truck-Lite® - 50 Series 456" 1 Plug Marker Clearance Wiring Harness
    Truck-Lite®50 Series 456" 1 Plug Marker Clearance Wiring Harness (50305)
    0
    # mpn1578788286
    Universal 50 Series 456" 1 Plug Marker Clearance Wiring Harness (50305) by Truck-Lite®. 14 Gauge. PL-10, Blunt Cut. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the utmost...
    Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments
    $53.68
  • Truck-Lite® - 50 Series 456" Driver Side 1 Plug Turn Signal Wiring Harness
    Truck-Lite®50 Series 456" Driver Side 1 Plug Turn Signal Wiring Harness (50345)
    0
    # mpn1578788328
    Universal 50 Series 456" Driver Side 1 Plug Turn Signal Wiring Harness (50345) by Truck-Lite®. 14 Gauge. Straight PL-3, Blunt Cut. This product is made from high-grade materials to meet the strictest standards of high quality. Designed...
    Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments
    $47.73
  • Truck-Lite® - 50 Series 456" Passenger Side 1 Plug Turn Signal Wiring Harness
    Truck-Lite®50 Series 456" Passenger Side 1 Plug Turn Signal Wiring Harness (50344)
    0
    # mpn1578788329
    Universal 50 Series 456" Passenger Side 1 Plug Turn Signal Wiring Harness (50344) by Truck-Lite®. 14 Gauge. Straight PL-3, Blunt Cut. This product is made from high-grade materials to meet the strictest standards of high quality....
    Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments
    $50.67
  • Truck-Lite® - 50 Series 72" Driver Side 3 Plug Stop/Turn/Tail and Back-Up Wiring Harness with Stop/Turn/Tail Breakout
    Truck-Lite®50 Series 72" Driver Side 3 Plug Stop/Turn/Tail and Back-Up Wiring Harness with Stop/Turn/Tail Breakout (50205)
    0
    # mpn1578788260
    Universal 50 Series 72" Driver Side 3 Plug Stop/Turn/Tail and Back-Up Wiring Harness with Stop/Turn/Tail Breakout (50205) by Truck-Lite®. 14 Gauge. Right Angle PL-3, Blunt Cut. This product is made from high-grade materials to meet the...
    Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments
    $50.63
  • Truck-Lite® - 50 Series 96" Driver Side 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance Breakout
    Truck-Lite®50 Series 96" Driver Side 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance Breakout (50209)
    0
    # mpn1578788258
    Universal 50 Series 96" Driver Side 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance Breakout (50209) by Truck-Lite®. 14 Gauge. Right Angle PL-3, PL-10, Ring Terminal. This product is...
    Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments
    $47.40
  • Truck-Lite® - 50 Series 96" Driver Side 3 Plug Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail Breakout
    Truck-Lite®50 Series 96" Driver Side 3 Plug Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail Breakout (51271)
    0
    # mpn1741210498
    Universal 50 Series 96" Driver Side 3 Plug Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail Breakout (51271) by Truck-Lite®. 16 Gauge. Fit &'N Forget S.S., Ring Terminal. This product is made from high-grade materials to meet the...
    Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments
    $95.34
  • Truck-Lite® - 50 Series 96" Passenger Side 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance Breakout
    Truck-Lite®50 Series 96" Passenger Side 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance Breakout (50208)
    0
    # mpn1578788259
    Universal 50 Series 96" Passenger Side 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance Breakout (50208) by Truck-Lite®. 14 Gauge. Right Angle PL-3, PL-10, Ring Terminal. This product is...
    Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments
    $49.22
  • Truck-Lite® - 50 Series Jam Nut
    Truck-Lite®50 Series Jam Nut (50845)
    0
    # mpn1578788446
    Universal 50 Series Jam Nut by Truck-Lite®. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the utmost care and attention to detail, this Truck-Lite product ensures superior...
    Use for installation of 3-part compression fittings in areas other than in the junction boxes1-1/8" clearance hole required.
    $2.99
  • Truck-Lite® - 88 Series 1.25" 3 Plug Marker Clearance Wiring Harness
    Truck-Lite®88 Series 1.25" 3 Plug Marker Clearance Wiring Harness (88342)
    0
    # mpn1741211219
    Universal 88 Series 1.25" 3 Plug Marker Clearance Wiring Harness (88342) by Truck-Lite®. 14 Gauge. Female 0.180 Bullet. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the...
    Dimensions ''A'' indicate standard stocked length harnessCustom length available in 12'' increments
    $16.44
  • Truck-Lite® - 88 Series 192" Upper 3 Plug Identification Wiring Harness
    Truck-Lite®88 Series 192" Upper 3 Plug Identification Wiring Harness (88301)
    0
    # mpn1578789015
    Universal 88 Series 192" Upper 3 Plug Identification Wiring Harness (88301) by Truck-Lite®. 14 Gauge. PL-10, 0.180 Bullet. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the...
    Dimensions ''A'' indicate standard stocked length harnessCustom length available in 12'' increments.
    $38.76
  • Truck-Lite® - 88 Series 22" 1 Plug Main Cable Wiring Harness
    Truck-Lite®88 Series 22" 1 Plug Main Cable Wiring Harness (88810)
    0
    # mpn1578789060
    Universal 88 Series 22" 1 Plug Main Cable Wiring Harness (88810) by Truck-Lite®. 10, 12 Gauge. Female 7 Pole Plug, Butt Splice. This product is made from high-grade materials to meet the strictest standards of high quality. Designed...
    Dimensions ''A'' indicate standard stocked length harnessCustom length available in 12'' increments.
    $52.01
  • Truck-Lite® - 88 Series 30" 2 Plug Marker Clearance Wiring Harness
    Truck-Lite®88 Series 30" 2 Plug Marker Clearance Wiring Harness (88307)
    0
    # mpn1578789052
    Universal 88 Series 30" 2 Plug Marker Clearance Wiring Harness (88307) by Truck-Lite®. 14 Gauge. PL-10, 0.180 Bullet. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the...
    Dimensions ''A'' indicate standard stocked length harnessCustom length available in 12'' increments.
    $14.07
  • Truck-Lite® - 88 Series 55" Rear 15 Plug License and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance and Auxiliary and Tail Breakout
    Truck-Lite®88 Series 55" Rear 15 Plug License and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance and Auxiliary and Tail Breakout (88911)
    0
    # mpn1578789056
    Universal 88 Series 55" Rear 15 Plug License and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance and Auxiliary and Tail Breakout (88911) by Truck-Lite®. 14 Gauge. Male 7 Pole Plug, Right Angle PL-3, Female 0.180...
    Expertly crafted from superior materialsProvides exceptional reliability
    $133.78
  • Truck-Lite® - 88 Series 56" Lower 4 Plug Identification Wiring Harness
    Truck-Lite®88 Series 56" Lower 4 Plug Identification Wiring Harness (88300)
    0
    # mpn1578789016
    Universal 88 Series 56" Lower 4 Plug Identification Wiring Harness (88300) by Truck-Lite®. 14 Gauge. PL-10, 0.180 Bullet. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the...
    Dimensions ''A'' indicate standard stocked length harnessCustom length available in 12'' increments.
    $26.28
  • Truck-Lite® - 88 Series 715" 1 Plug Main Cable Wiring Harness
    Truck-Lite®88 Series 715" 1 Plug Main Cable Wiring Harness (88701)
    0
    # mpn1578789044
    Universal 88 Series 715" 1 Plug Main Cable Wiring Harness (88701) by Truck-Lite®. 10, 12 Gauge. Female 7 Pole Plug, Ring Terminal. This product is made from high-grade materials to meet the strictest standards of high quality. Designed...
    Dimensions ''A'' indicated standard stocked length harnessCustom length available in 12'' increments.
    $216.12
  • Truck-Lite® - Access Small Rear Receptacle Boot
    Truck-Lite®Access Small Rear Receptacle Boot (50890)
    0
    # mpn1741211474
    Universal Access Small Rear Receptacle Boot by Truck-Lite®. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the utmost care and attention to detail, this Truck-Lite product...
    Protects electrical connections from moisture in flush mount applicationsLarge boot fits all full sized receptacles
    $8.94
  • Truck-Lite® - Signal-Stat 20" 1 Plug 3 Wire Connector for 5800 Series
    Truck-Lite®Signal-Stat 20" 1 Plug 3 Wire Connector for 5800 Series (9465)
    0
    # mpn1578789251
    Universal Signal-Stat 20" 1 Plug 3 Wire Connector for 5800 Series (9465) by Truck-Lite®. 18 Gauge. Packard Connector 12162182, Blunt Cut. This product is made from high-grade materials to meet the strictest standards of high quality....
    Packard Metri-Pack connector eliminates corrosion and salt creep easy hook-upHeat shrink tubing provides sealed connection 21'' length, 18 gauge wire.
    $13.53
  • Truck-Lite® - Signal-Stat 21" 1 Plug 4 Wire Connector for 5010 Series
    Truck-Lite®Signal-Stat 21" 1 Plug 4 Wire Connector for 5010 Series (9464)
    0
    # mpn1578789252
    Universal Signal-Stat 21" 1 Plug 4 Wire Connector for 5010 Series (9464) by Truck-Lite®. 18 Gauge. Packard Connector 1265862, Stripped End, Ring Terminal. This product is made from high-grade materials to meet the strictest standards of...
    Expertly crafted from superior materialsProvides exceptional reliability
    $19.71
  • Truck-Lite® - Signal-Stat 21" 1 Plug 5 Wire Connector for 5020 Series
    Truck-Lite®Signal-Stat 21" 1 Plug 5 Wire Connector for 5020 Series (9470)
    0
    # mpn1741209972
    Universal Signal-Stat 21" 1 Plug 5 Wire Connector for 5020 Series (9470) by Truck-Lite®. 18 Gauge GPT Wire. Stripped End/Ring Terminal. This product is made from high-grade materials to meet the strictest standards of high quality....
    Five pin Packard Metri-Pack connection to lamps with two (Dual Pack) connector socketsUsed for installation of OEM rear signal lamps where harness is routed down one frame rail of vehicle
    $16.79
  • Truck-Lite® - Signal-Stat 29" 2 Plug Jumper Wiring Harness for 5020 Series
    Truck-Lite®Signal-Stat 29" 2 Plug Jumper Wiring Harness for 5020 Series (9469)
    0
    # mpn1578789250
    Universal Signal-Stat 29" 2 Plug Jumper Wiring Harness for 5020 Series by Truck-Lite®. 16 Gauge. 29" Back-Up, License, Stop/Turn/Tail Harness, Packard Connector 12065862, Packard Connector 12065862. This product is made from high-grade...
    Replacement jumper harness for 'Daisy Chain' lamps supplied as original equipment on Navistar, Volvo and Freightliner vehiclesUsed for lamp to lamp connection
    $32.35
  • Truck-Lite® - Super 50 0.215" PVC 1 Conductor Compression Fitting
    Truck-Lite®Super 50 0.215" PVC 1 Conductor Compression Fitting (50843)
    0
    # mpn1578788447
    Universal Super 50 0.215" PVC 1 Conductor Compression Fitting (50843) by Truck-Lite®. 3-part fitting consisting of a pre-tapped cap, threaded base and black PVC grommet that is available with 6 different hole sizes to accommodate...
    Expertly crafted from superior materialsProvides exceptional reliability
    $7.67
  • Truck-Lite® - Super 50 0.375" PVC 2 Conductor Compression Fitting
    Truck-Lite®Super 50 0.375" PVC 2 Conductor Compression Fitting (50840)
    0
    # mpn1578788450
    Universal Super 50 0.375" PVC 2 Conductor Compression Fitting (50840) by Truck-Lite®. 3-part fitting consisting of a pre-tapped cap, threaded base and black PVC grommet that is available with 6 different hole sizes to accommodate...
    Expertly crafted from superior materialsProvides exceptional reliability
    $7.95
  • Truck-Lite® - Super 50 0.45"x0.19" PVC 3 Conductor Compression Fitting
    Truck-Lite®Super 50 0.45"x0.19" PVC 3 Conductor Compression Fitting (50846)
    0
    # mpn1578788445
    Universal Super 50 0.45"x0.19" PVC 3 Conductor Compression Fitting (50846) by Truck-Lite®. 3-part fitting consisting of a pre-tapped cap, threaded base and black PVC grommet that is available with 6 different hole sizes to accommodate...
    Expertly crafted from superior materialsProvides exceptional reliability
    $8.04




So, you’ve got your trailer connected to your truck with the right hitch, ball mount and trailer ball. You’re ready to go, but what about your trailer lights? If the trailer connector doesn’t match the one on your tow vehicle, or if the vehicle doesn’t even have a plug, stick around. From basic exterior lights to 12-volt powered accessories, all trailers need electric power supplied by your vehicle, and we have everything needed to make a hassle-free connection including extensions, connectors, harnesses and adapters.

There are a number of standardized trailer connectors, such as 4-pin flat/round, 5-pin flat, 6-pin square/round, and 7-pin round. The simplest 4-pin system is used for small trailers, and has one ground pin, one pin each for left and right turn signals and brake lights, and one for the running lights. 5-pin flat connectors add a wire for the back-up lights. If the trailer is equipped with surge brakes, this circuit also disengages the brakes when the vehicle is backing up.

In addition to connections for turn signals, brake lights, tail lights and ground, 6-pin connectors have one terminal each for electric brakes and 12-volt accessories. 6-pin connectors come in square and round styles and are common to gooseneck and 5th wheel trailers, boat trailers and campers. 7-pin connectors are most commonly found on new vehicles that are prewired for towing. Along with the same functions as a 6-pin connector, this connector has a 7th circuit that is for the back-up lights. 7-pin connectors come with round or RV blade-style pins. Fortunately, no matter what connector you have on your trailer, we have the wiring harnesses that will let you plug into your vehicle’s electrical system.

The first thing you have to determine is whether your vehicle has a factory installed trailer towing package. If it does, you’ll find an electrical connector at the rear of the vehicle, usually on or near the bumper. If the shape and number of pins (wires) on the vehicle connector matches the one on your trailer, then all you’ll need is a wiring harness of sufficient length with the same connector at each end. If not, we can supply you with a plug-and-play adapter harness that will make all your trailer electrical functions work, without any cutting and splicing. For example, if your truck has a 7-pin round connector but your trailer has a 4-pin flat connector, one of our adapter harnesses will have you connected in minutes.

But don’t worry if your vehicle isn’t already set up for towing, we can still get you connected without much hassle. For most vehicles we offer a plug-and-play T-shaped harness (so called because it connects to both of your tail lights) that connects your vehicle lights to the trailer lights. If you have an obscure vehicle for which no T-shaped harness is available, we can still help, but some splicing will be necessary. And if your vehicle uses separate bulbs for the brake lights and turn signals but your trailer uses one bulb for both, we can supply you with a converter harness that will make the connection simple. We also have a large assortment of brackets, connectors, sockets, and anything else you need to get connected.

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