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Expert Answers about Trailer Lights


  • Trailer Tail Light Needed for Trailer with Separate Turn Signals and Stop/Tail Lights
  • I have attached a link to all of our oval trailer lights for you. Most 6 inch oval lights are actually 6-1/2 inches long by 2-1/4 inches wide. I recommend measuring your trailer lights to make sure you choose a replacement light with the same dimensions as your tail lights. We do not have oval tail lights that are exactly 6 inches long, but you could enlarge the cutouts on your trailer to accommodate the standard 6-1/2 inch lights. Our oval trailer lights are available with red, amber...
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  • Troubleshooting Old Horse Trailer Lights Not Working Properly With Different Vehicles
  • Based on what you are describing, and the fact that this happens on both your Jeep and truck, you have a bad ground connection somewhere on the trailer. Make sure all of your ground connections are secure on a clean, bare-metal surface. A bad ground is the only explanation for the bizarre behavior of your trailer lights.
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  • Troubleshooting Trailer Lights Going Out When the Brakes are Applied After Trailer Light Kit Install
  • It sounds like you have a ground issue. When trailer lighting does not have a sufficient ground many different scenarios can show up, but the most prevalent is when the most amperage is applied, like tail lights on and brake pedal pressed, the lights go out. All lights must be properly grounded for proper function. When installing the standard trailer light kit, # TL29BK, the lights are grounded through the mounting studs. You need to make sure that the mounting studs are contacting the...
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  • Replacement Trailer Lights for 1999 Ranger Trailer
  • Since trailer makers don't usually keep specs on the lighting parts used on their trailers the easiest way to identify replacements is to note a few things about your lights, like size, shape and color, and to use the linked page that shows you all trailer lights we offer that have white/clear lenses. Simply click on the filters on the light page to narrow the results to the items that match your lights. For example, if you click on 'round' and 'surface-mount' you'll see lights like the...
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  • How to Determine Width of Trailer for Lighting Purposes
  • To determine the width of your trailer for lighting purposes, the width is measured at the widest point of the trailer. It is the responsibility of the trailer owner to determine the width of their trailer, and to ensure that it lit according to state and federal regulations. Your state police, highway patrol or department of transportation is a great resource for finding the regulations that apply in your area. All clearance and marker lights are tied into the running light circuit...
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  • Trailer Left Side Running Lights Not Working All Other Lights Work
  • On many trailers the running light wires are jumped from one side to the other on the trailer. This is because there is a single running light wire only ran on one side. A wire would have to be spliced in on the one side, ran to the other side of the trailer, and connected to the running lights. If using a junction box, the one running light wire from the trailer connector can go to a single terminal and from there you can run separate wires for the running lights on each side of the trailer....
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  • Recommendation for Bright, 2-1/2 Inch, Round, Trailer Tail and Clearance LED Lights
  • The Peterson Piranha LED 2-1/2 Inch Round Trailer Clearance Light, 3 Diode # 162R light that you referenced is certainly a bright trailer light. This 3 diode LED light will be brighter than a standard trailer light for you. I have attached a review video of the # 162R and the # 162A for you to see what the lights look like when they are on in the dark. The Peterson Piranha lights will install on the trailer using a 2-wire pigtail and grommet, # 162-18K. These LED light will work great...
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  • Is the Oval LED Trailer Utility Light a Flood or Spot Light Style for Interior Trailer Lighting
  • The Oval, LED Trailer Utility Light, item # BUL78C3MB, is designed as an area light, more like a flood than a spot light, and would be a good choice for interior lighting in an enclosed cargo trailer. The Straight 3-Wire Pigtail, item # A45PB, can be used for wiring this light. This LED light could be spliced into the tail light circuit, so the lights can be activated with the vehicle tail lights. A switch inside the trailer would be needed so that the lights are not on when traveling down...
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  • How to Wire a Trailer Light with 1 Wire
  • It sounds like the light on your trailer is either missing a wire or it was only designated for one tail light function. If the light does not look old or damaged, I would guess that it is just a clearance light and should be connected to the running light circuit. If this is the case, it should not function as a brake light as well because it was not designed to do so. The brake lights and tail lights run on different circuits and they were not designed to connect to the same wire on a...
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  • Recommended Replacement Waterproof LED Lights For 80-Inch Wide E-Z-Loader Trailer
  • You said your trailer is 80 inches wide. For trailers that are 80 inches or wider, side clearance lights are required. I recommend the Wesbar tail light, part # 271584-01 for the passenger side of your trailer. This light has 7 functions, Stop light, Tail light, Turn signal light, Side marker light, Side reflex reflector, Rear clearance light, and Rear reflex reflector. The light has 13 LED diodes and is waterproof. this light measures 6 inches long, 3-1/2 inches wide and 2-1/4 inches...
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  • Reverse Light Recommendations for a Motorcycle Trailer
  • If the trailer is one designed to carry a motorcycle, you can add some reverse lights to it. I recommend two lights, one on each side of the rear of the trailer. There are better suited lights for this application. I recommend the Sealed, 6-1/2 inch LED Clear Oval Trailer Utility Light, 10 Diode, # BUL72CB. These lights are submersible. You will also need a rubber grommet, # a70gb, for each light, and a pigtail, # A45CB, for each light. To mount the lights, you can use Mounting Bracket...
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  • Trailer Right Side Running Not Work, All Other Trailer Lights Work
  • If you are not getting power on the running light circuit at the connector on the truck then none of the running lights should be working on the trailer. Trailer's in the US use one circuit for running lights, one circuit for left turn/brake lights, and one for right turn/brake lights. So if just the right side running light is not working then it is likely a bad ground or wiring issue somewhere on the trailer. Ground problems normally show up when there is more draw on a system such as...
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  • Will Optronics Submersible LED Trailer Tail Light # STL56RB Fit a 1987 Shorelander Trailer
  • Yes, the Optronics Tall Rectangle Submersible LED Trailer Tail Light, part # STL56RB, will work on your 1987 Shorelander trailer. We have gotten back many reviews of these lights working just fine on Shorelander trailers. I will give you the dimensions of the lights so you can make sure they will fit your trailer. The light is 6-1/16 inches long x 3-5/8 inches wide x 2-1/4 inches deep. They have two slots on the back of the light, 2 inches apart, for mounting on the trailer. The light...
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  • Trailer Lights Flash with Vehicle Flashers and Go Out when Stepping on the Brakes
  • So it sounds like the flashers are tied into the running light circuit on the truck side. I am not sure it this is how it is supposed to be or if there is a wiring issue on the truck. The correct 4-Way for a 1998 GMC C/K series is # 118315. It just plugs in line with the vehicle tail light harness, see instructions link. Applying the brakes may be causing the trailer lights to go out while the flashers are on because it is too much draw on the wiring which is causing the lights not to...
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  • Installation of Optronics Sealed, 6-1/2 Inch Oval LED Trailer Stop, Turn, and Tail Light
  • Thank you for your purchase from etrailer.com! The Optronics Sealed, 6-1/2 Inch Oval LED Trailer Stop, Turn, and Taillight # STL78RB that you purchased will need to be hardwire installed on your trailer. You will want to connect the light to your trailer's wiring by function. You can use a circuit tester, like # PTW2993, to determine the functions of your trailer wiring. The white wire on the light will need to be grounded. I recommend running the light ground back to the main trailer...
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  • Replacement Trailer Lights for Palomino Camper Trailer
  • Your Palomino trailer should be following the "Less Than 80" Wide and Less Than 30' Long" guidelines for trailers which To replace the lights on your Palomino trailer I recommend checking out the Trailer Light Kit for Trailers Over 80" Wide # TL16RK which comes with the rear stop/turn/tail lights as well as the license plate mounting bracket (and light) and the side clearance lights. If you need to replace the middle clearance light at the back as well let me know what your current one...
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  • Availability of Bracket Mounted Utility Light to Use as Interior Light for Trailer
  • For an exterior light solution I would use the Sealed, 6-1/2 inch LED Clear Oval Trailer Utility Light, 10 Diode, item # BUL72CB, along with the Rubber Grommet for 6-1/2 inch Oval Trailer Tail Lights, item # A70GB, and the Trailer Light Mounting Bracket for 6-1/2 inch Oval Trailer Lights, Steel - Black Powder Coat, item # BK70BB. You'll also need the pig tail part # A47PB.
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  • LED Light Recommendation for Converting Lights of 2001 Ford Ranger Boat Trailer
  • You can certainly use the Optronics kit # TLL160RK for your boat trailer. These tail lights are great for marine trailers as they are sealed and have a waterproof construction. This kit includes 2 red LED tail lights. These lights will need to be hardwired to your trailer, and have a separate ground wire. For some LED clearance lights the part # MCL32AB would work as well.
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  • Trailer Tail Light Options for a Tear Drop Trailer
  • The Aero Pro Submersible LED Trailer Tail Light, # STL36RB, is a surface mount light. To mount this light you would need to have 2 or 3 bolts sticking out from the surface of the trailer because this light has slots on the back that fit over the bolt head and hold it in place. Is does not come with mounting hardware and a special bracket is not needed. The license plate light is made to shine down through the bottom. I would go with a flush mount light like # STL34RB. These lights will...
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  • Malfunction of Trailer Blinker Lights When Lights On Truck Are On
  • It sounds like there may be a loose or bad ground on the trailer light. When the lights on your truck and trailer are on and you use the brakes or turn signal, the system is at its max load of amps and with a bad or weak ground, the light cannot support all the power of both the running lights and turn signal. I would start by checking the ground connection on both lights to make sure there is contact to a clean, rust-free metal surface. Also, if you have a plastic license plate holder,...
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