Expert Answers about RV Exterior Lights

• Troubleshooting Trailer Interior Lights That Won't Work While Exterior Lights Do Work
• The exterior lights on your trailer - stop, turn and tail - and the interior lights will usually be fed by different power sources. On an RV-style 7-way the stop/turn light signals are carried on the pins at the 3-o-clock and 9-o-clock positions and the tail/clearance light signals are carried on the pin at the 11-o-clock position. The +12V auxiliary power circuit on the 7-way that would normally feed a trickle charge to maintain a battery mounted on the trailer is carried on the pin at...
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• Troubleshooting Interior Lights Not Working On an Enclosed Trailer
• It sounds like your interior lights on your 2019 Legend are powered off a secondary battery. The exterior clearance/ marker and tail lights are powered directly from your 2020 GMC Sierra 1500. The small battery on the front is generally only used for electric trailer breakaway brakes. If being used with additional lighting the battery is replaced with a larger unit. You will want to check for any additional terminals which you may need to trace from the light switch itself. If you have...
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• Replacing a Ladder Rung When the Connection of the Rung Becomes Loose
• There are some replacement rungs available depending on what ladder you have. If you have the Stromberg Carlson Exterior RV Ladder # LA-401BA you were looking at, we do have replacement rungs available. - Replacement Rung for Stromberg Carlson Exterior RV Ladders # 8540-NTB If you do not have this ladder and can let me know what ladder you have, I would be happy to check on a replacement rung. Replacing the rung could help tighten that connection back up. You can also use the Stromberg...
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• Jensen Mechless RV Stereo Speakers Won't Connect
• Thank you for your purchase of the Jensen Mechless RV Stereo # JWM20. If you are sure you have successfully paired your Bluetooth to the unit, you will need to check the speaker wires behind the unit. This is pretty unlikely to be the issue so I would recommend attempting to continue trying the Bluetooth connection and pairing it.
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• Troubleshooting 2002 F-250 Towing Horse Trailer with Working Exterior Lights but No Interior Lights
• It sounds like the interior lights on your trailer are powered through the 12 volt circuit on your Ford's 7-way. So, start by testing to make sure that pin is active. On a standard RV style 7-way, this is located at the 1 o'clock position. I've attached a diagram for visual reference. Using a tester like # PK12741 would be the easiest. You could also simply have a case of corrosion on/in the connectors that is preventing the +12V auxiliary power from reaching the trailer. If this is the...
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• Troubleshooting Exterior Trailer Lights not Working
• The exterior lights of your horse trailer will be powered by the 12 volt circuit from your 7-way or an auxiliary 12 volt battery and since it seems the interior lights are still working the issue is likely the wiring is damaged or if you are using a fuse or power distribution box the issue could be something as simple as a blown fuse or a bad switch. You can use Circuit Tester # PTW2979 to determine if there is power getting to the switch or not and figure out exactly what wires are not...
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• Troubleshooting Turn Signal Lighting Issues On 2014 Forest River 29 Foot Trailer
• Your 2014 Forest River 29 foot camper has one of two issues. It may have a bad ground wire either on the camper itself or on the vehicle side of the connection. I recommend checking your ground wire connections for corrosion, rust, and debris to ensure you have a bare metal to metal connection. I also recommend checking your trailer connections and cleaning them as a little corrosion can also cause this. Then use some dielectric grease like # 11755 to help with the electrical connection...
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• Truck Trailer Connector Works but Camper Lights Will Not Come On
• Since there is power on the vehicle side trailer connector the issue must be on the trailer. Plug the trailer into the tow vehicle and use a circuit tester such as # PTW2993 to see if power is making it through the trailer side connector. If not, then you likely have to replace the trailer side connector. Also be you are using an adapter then that adapter may not be compatible or damaged. If power is getting through to the trailer side connector you can keep testing the wires as you go...
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• Troubleshooting Interior and Exterior Horse Trailer Lights When Hooked Up to 2020 Ram 1500
• For your situation either your 2020 Ram 1500 isn't sending power through the 7-Way connector, or your horse trailer wiring isn't working correctly for that 12V power. The easiest way to tell which end is the issue is to test the 12V power pin on your truck to see if there is power there (see attached). If you aren't seeing power then you likely need to check your fuse for that function, but if you are seeing power then that means there is a fuse or some wiring that needs to be checked...
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• Troubleshooting Interior Dome Lights On an Enclosed Trailer Not Functioning
• Depending on how your 2011 Noe trailer was wired you will have a couple things to check. First the exterior running lights, brake lights and turn signals will run off different circuits than any interior dome lights. Typically with interior lights there will be a dedicated battery for the lights so they can still be operated when not connected to your tow vehicle. Otherwise they will likely just be connected to the auxiliary charge line circuit on the 7-way. A Test Light # PTW2993 can be...
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• Trailer Running Lights Flash when Turn Signals are On
• Somewhere in the wiring the turn signal wire(s) is touching the running light wire. This is likely happening closer to the front of the trailer, perhaps at the connector but I would not rule out a short anywhere from the front to the back. Also, by any chance does the wiring on the trailer side behind the trailer connector have 2 wires associated with just 1 pin? If so this is a wishbone harness. You would have one running light wire for the left side and one for the right side but they...
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• Lights Not Working on Camper Towed by 2004 Ford F150 Using 4-Pole To 7-way Adapter
• You said that the adapter is getting power, but is the 7-way on the adapter putting out power on the lighting circuits? You'd need to use a circuit tester like part # PTW2993 on the 7-way as each taillight function is activated, to check it. If the 7-way on the truck tests out okay, but won't work on the trailer (which works on other vehicles) try using the truck with a different trailer if possible. This will 100 percent rule out the truck as being the problem. You still might have a...
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• Troubleshooting Trailer Loading Lights Connected to 2015 Dodge Ram
• From your description it appears you do not have continuity from the batteries 12v supply to the pin for lighting. This may be due to a fuse or absence of that pin connected on your Ram where it is/was on the Chevy. Please see the attached wiring diagrams for assistance in trouble shooting and start with ensuring the pin for lighting on trailer is hot on the vehicle side. When referencing the 7-Way RV Plug diagram that I have attached, make sure you are looking at the plug the way the...
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• Enclosed Trailer Interior Lights Not Working
• Many interior trailer lamps are tied into the trailer's running lamp circuits. Try operating the lamps with the vehicle running lamps switches on. You'll also want to check for an interior switch for the lights which would usually be located just inside the door.
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• Troubleshooting Non-Working Exterior Lights on Refurbished 1965 Trailblazer Camper
• I agree that a grounding issue seems the most-likely cause for your refurbished 1965 Trailblazer camper's lighting issue. If the camper was stored for a time after you re-worked the ground wire it is possible that corrosion has developed. We often suggest applying dielectric grease # 11755 at the grounding point both before and after securing the ground wire ring terminal to the trailer frame. The grease blocks moisture and grime that can lead to corrosion. You should not need a second...
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• Troubleshooting Wiring Connections on Alpena Quad Strobes That Were Spliced
• The Alpena Quad SlimStrobe Exterior Lights # ALP78304 come assembled, so we don't have a wiring diagram for them. They are intended to be simply connected to your battery positive and negative battery terminals. LED lights like this are polarity sensitive, so the lights will work when the correct wires are connected and will not work when the power and ground are reversed.
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• Troubleshooting Interior Lights On Trailer Not Working When Connected To a 2021 Chevrolet Silverado
• It sounds like you may not have power going to the charge line circuit on your 2021 Chevrolet Silverado. You will need to first check your owners manual on your Silverado to find the 12 volt power trailer fuse. This is typically the issue causing power not to get to your interior lights. The exterior lighting on your trailer will run off your running lights for your Silverado. The interior lights are generally connected to a battery in or on the trailer which is then charged by the charge...
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• Do I Need Load Resistors For Each Light Replaced by a LED Light
• LED lights draw less power than the incandescent lights you are replacing which can cause issues. You will want to use load resistors like Load Resistor Kit for LED # DI34ZR on each light you are replacing.
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• Trailer Running Lights Only Work when Interior Lights are Turned On
• If the white wire is the ground then what you might be experiencing is a short to ground. But the main issue here is that the interior lights need to be wired from the switch to the battery independently of any of the exterior lights. After you have isolated the interior light wiring from the external light wiring the problems may heal or it could reveal additional wiring problems. Be sure that all of the lights are grounded to clean and corrosion free bare metal surfaces. Try to inspect...
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• Troubleshooting External Water Connection Where No Water Sprays When Connected
• The D&W Inc. Spray-Away RV Exterior Hose System - 5-1/2" Square - 15' Hose - White # PF147007 you referenced. If there is water getting to the unit it absolutely should spray water when the quick connect is attached. It sounds like there is a shut-off valve somewhere between the T and the Spray-Away which is actually recommended.
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