Expert Answers about Hyundai Tucson

• Trailer Turn Signals Do Not Work With Brake or Running Lights On a 2012 Hyundai Tucson
• This sounds like a bad ground connection on the trailer since 2 separate harnesses yielded the same results. To make sure it is the trailer and not the wiring harness you can test the installation using a circuit tester like # PTW2993 if you need one. Unhook the trailer and use the circuit tester to test the 4-Way end of the harness while someone sits in the vehicle and goes through the various functions. Be sure to test the turn signals with the brakes applied and/or the running lights...
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• Troubleshooting Solid Red Lights on Trailer Towed by 2013 Hyundai Tucson with Curt 4-Pole Harness
• On a 4-pole wiring harness like Curt part # C56348 that fits your 2013 Hyundai Tucson the brake and turn signal light functions are carried on the same wire; green for the passenger side and yellow for the driver side. The brown wire carries the tail light (also called a running light) signal for both sides of the trailer. Which lights remain on? I suggest you test the trailer wiring without it plugged in to the vehicle. This is easy to do, using either the vehicle battery or a spare as...
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• Troubleshooting Trailer Wiring Harness Converter Box
• What you will want to do is test the wires going into the box of the converter box for voltage with a circuit tester like the # 3808 to see if there is voltage going into the box when the taillight functions of your vehicle are applied, and then test the output side of the box to see if the current is making it through the converter. If not then the problem is that the converter box has shorted itself out and would need to be replaced. Before you replace it you will want to inspect the...
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• Troubleshooting 4-Pole Wiring That Lights Up LED Tester But Does Not Operate Trailer Lights
• A lighting tester that uses LEDs, like the one in your photo, will take very little power to illuminate. Test light LEDs are so sensitive that they will sometimes light up even when no signal is activated; this can occur from the low-level residual power that some wiring kits put out. The powered 4-pole trailer wiring harnesses available for your 2014 Hyundai Tucson include Curt product # C56348 and Tekonsha # 118501. If none of the trailer lights work, you can test to find the issue....
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• Left Brake Light Not Working After Installing Cargo Box With Lights on 2006 Hyundai Tucson
• If the cargo box that is on the back of her 2006 Hyundai Tucson has lights on it, then there is a possibility that something is not hooked up correctly or has come disconnected. I would start by checking the trailer wiring connector on the 2006 Hyundai Tucson, part # 118397 and make sure it is working correctly and not corroded. Also, make sure it has a good ground connection with metal-to-metal contact. Also check to make sure all the wiring points are good. If the connector is not...
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• Tail Light Converter on 2008 Hyundai Tucson Keeps Shorting Out
• If you have a harness that is currently acting up, you can use a circuit tester like part # PTW2993 and do some troubleshooting on it. You can activate the right turn signal, then use the tester to check the green wire on the input side of the converter box to ensure that the signal is reaching the box. Then, test the green wire on the output side to make sure the signal is leaving the box. Repeat the same test with the yellow left turn and brown running light wire, checking both the input...
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• Troubleshooting a Brake Controller Draining a Vehicle Battery When Not in Use
• It sounds like there is a short somewhere in the system that is drawing power and draining the battery. The brake controller you have should only draw a few milliamps of power when not in use. The most likely shorts are a short to ground and a short to the blue wire. Start at the brake controller and sever the blue wire leaving enough length to reconnect when finished testing. If everything is shut off, test the blue wire to determine if there is voltage coming through. You can use a multimeter...
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• Trouble Installing Hardware into Factory Weld Nuts For Curt Receiver C13240 On a 2019 Hyundai Tucson
• The Curt Trailer Hitch Receiver # C13240 for your 2019 Hyundai Tucson includes M10x1.25-30mm bolts to thread into your frames existing weld nuts. It is possible while the threads are cleaned out with a Brush # 814113 that their could be paint overspray or corrosion inside the threads that needs to still be cleaned out. To clean that out you will need a tap from a Tap and Die Set # PT43FR to get any material out from inside the threads. If you do not feel comfortable doing this a service...
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• Malfunction of Tow Ready Trailer Wiring Harness # 118501 in 2011 Hyundai Tucson
• Thank you for your recent purchase from etrailer. Many times, issues related to wiring harness installation can be traced to a weak ground, so you can make sure the white ground wire is secured to a clean bare metal surface. But in your case, it does sound like the converter box may be damaged. Certain faults in trailer wiring could damage a converter. If this is what happened in your case, it could result in leakage from the output side of the converter back to the input side where the...
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• Troubleshooting Trailer Light Flashers with 2012 Hyundai Tucson
• It sounds like you might have a ground issue. A ground issue usually appears when there is a bigger draw is placed on the wiring. This could explain why the flashers work when the vehicle is off, but will not work when the vehicle is on. Check the white ground wire to make sure that the contact is secure and undamaged, free of dirt, and doesn't show signs of corrosion. Even if there aren't these visible signs, your ground may be in a bad location. Try moving the ground to a better location...
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• Troubleshooting No Turn or Brake Signals On Trailer Wiring
• First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # 3808 for voltage on all of the right pins when the taillight signals are being applied. Just like in the video I attached. If the voltage checks out there but the trailer lights still don't function right then the problem is on the trailer wiring. That would mean that problem is either due to a ground issue or a short issue. Make sure that the trailer side connector are clean and...
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• Troubleshooting a Curt 4-Way Harness with No Output Voltage
• What you will want to do is test the wires going into the box of the Curt Wiring Harness part # C56496 for voltage with a circuit tester like the # PTW2993 to see if there is voltage going into the box when the taillight functions of your vehicle are applied, and then test the output side of the box to see if the current is making it through the converter. If not then the problem is that the converter box has shorted itself out and would need to be replaced. Before you replace it you will...
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• Troubleshooting 2017 Hyundai Tucson Running Lights Flicker After Adding LED Bumper Lights
• For your application I'd put a load resistor on the LED light you installed since that is what seems to have caused the issue. When you add LED lights to a system that wasn't built for them it tends to do weird things. If you install the Load Resistor Kit # DI34ZR on the light fixture you just installed then this should fix the issue.
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• Right Turn Signal Only Works when Brakes Applied on Trailer Towed by 2010 Hyundai Tucson
• This sounds like a ground issue since it is just the turn signal on the right side.. What you will want to do is make sure that the main trailer connector ground and the light grounds are all attached to clean and corrosion free bare metal surfaces. Also make sure the trailer and vehicle side connectors are clean and that the trailer wiring converter on the vehicle, unless it was a factory harness, is properly grounded to bare metal.
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• Troubleshooting Intermittent Turn Signals On 2005 Hyundai Tucson
• It is possible that a controller like the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C55528 has gone bad. To test it, I recommend using a circuit tester like # PTW2993 to see the function at your 4-way when the trailer is not connected. This will help you determine if it is vehicle wiring or trailer wiring causing the issue. If the issue is with the vehicle side, you will need to replace the unit. If the 4-way is good on your vehicle test, then I...
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• Taillight Removal 2012 Hyundai Tucson to Install Curt T-Connector 4-pole Wiring Harness
• After reviewing the notes on your order I see that you now have the correct Curt T-Connector Wiring Harness specifically fit for your 2012 Hyundai Tuscon, # C56348. The Curt T-Connector 55528 that you referenced is considered a fit for Hyundai Tuscons from 2005-2009. After discussing the difficulties that you are describing with both Curt and fellow experts, it is not uncommon that the taillights of your vehicle are difficult to remove. It sounds like the mounting pegs are very snugly...
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• Troubleshooting Trailer Connector on 2016 Hyundai Tucson Not Sending Power
• It sounds like there is a problem with the OEM wiring on your 2016 Hyundai Tucson. You can try following the wiring that is giving you issues to see if there is damage and check your fuses. If you have a lot of lights on your trailer you may be overloading the circuit which is causing a fuse to blow. If the fuses and wiring looks good then I recommend installing the Tekonsha T-One # 118501 so that you bypass the OEM wiring. This plugs in behind your tail lights and then draws power directly...
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• Troubleshooting Curt Trailer Wiring Harness Installed on 2010 Hyundai Tucson
• Unless your trailer is unusually well lit, the # C56348 wiring harness should have plenty of capacity. From your description, it sounds like your converter has an internal short that is allowing the 12-volt feed from the battery feed back into the vehicle taillights. You can confirm this by using a circuit tester like part # 40376 on the inputs of the converter. With the vehicle shut off, you should only see power on the 12-volt battery feed. If you find power on any of the other wires,...
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• Testing a Malfunctioning Wiring Harness on a 2021 Hyundai Tucson
• This can be caused by a few things. First and foremost, you will need to check to make sure your ground is secure and attached to bare metal. It is best to not have this stacked with other wires and should be its own ground source. Once this is done, you will need to check your 4 Flat connection using a tester, like the Circuit Tester # PTW2993. The green wire is for the right turn signal, the yellow is for the left turn signal, and the brown wire is the brake signal, the one you are having...
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• Troubleshooting No Trailer Turn or Brake Lights After Extensive Testing
• I'm incredibly impressed with the extent of the testing you've already performed and thus can understand your frustration at still not finding the root of why your turn/brake signals are not working on the trailer. Reading through your troubleshooting steps a couple of things come to mind. First, it sounds like you have tested for continuity with the trailer wiring but I couldn't tell if you used the ohm reader to actually determine the voltage you're getting, especially as you get further...
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