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Expert Answers about Jeep Liberty


  • 2006 Jeep Liberty with Only Trailer Running Lights Operating
  • There could be a couple of things going on here. I would first check the vehicle 4 way plug to make sure that power is coming from each pin properly. To do this you'll need a helper and a circuit tester like the # PTW2992 . Go through each function: brakes and both turn signals to make sure that the plug is supplying power to the trailer as it should. If you find that there is an issue with the vehicle wiring harness, you'll need to check and make sure that the wires are all in good working...
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  • Why Would Trailer Wiring on a 2008 Jeep Liberty Prevent Reverse Lights from Functioning
  • The problem is most likely in the connectors of the trailer wiring you have installed on your 2008 Jeep Liberty. I would try removing the kit first and seeing if you can find any corrosion in the connectors and clean it out. If not a much easier and less expensive route would be to replace the trailer wiring with the Tow Ready kit part # 118554. This will allow you to get rid of the harness you have that doesn't allow the reverse lights to work with and then replace it with a kit that...
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  • Troubleshooting Brake Lights Not Working on Trailer with 2003 Jeep Liberty
  • I am not quite sure what wiring kit you used to install a 4-Way connector on your 2003 Jeep Liberty but it sounds like it may not have come with a converter. Your Jeep Liberty has a separate wiring system, which means the brake and turn signals are sent along separate wires. A harness with a converter is needed to combine these circuits so that they work with standard trailer wiring. For example the Curt T-Connector Vehicle Wiring Harness # C55382, which is custom-fit for your 2003 Jeep...
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  • No Turn or Brake Signals on Trailer on a Jeep Liberty with Tow Ready Harness 118524
  • The first thing to do is disconnect the trailer from the Liberty. Then using a circuit tester, like part # PTW2993, test each pin of the 4-Way. Clip the alligator clip of the circuit tester to the exposed post, the ground wire. Check each pin with the probe. The brown wire should be running lights. Yellow should be left brake and turn, and green should have the same functions but for the right side. If these functions all work, then the problem is on the trailer. If not, then the problem...
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  • Troubleshooting Trailer Lights Not Working WIth 2003 Jeep Liberty
  • It is pretty unlikely a module is bad for a wiring harness, so you'll need to troubleshoot, and I can give you some things to check out. You mentioned you have power, but you'll also want to take a look at your owner's manual to locate any trailer fuses or relays and ensure they are all there and in working order. If they are, in order to determine the specific problem you will need to use a circuit tester like # PTW2979 and test the connector on your vehicle after disconnecting it from...
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  • Interior Lights Not Working in a New Trailer with 7 Pin Wiring Harness on a 2002 Jeep Liberty
  • It sounds like you may need to install a fuse in the fuse block under the hood on your 2002 Jeep Liberty to get the 12 volt power circuit at the OEM 7-Way connector to work. But the first thing I would do is check the bulb just to be sure it is not bad, then check to see if the interior trailer light is connected to the running light circuit. Turn on the running lights and if there is a switch in the trailer make sure it is on. If the light does not light, then you can check the power circuit...
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  • Troubleshooting Inconsistent Tail Light Functions for Flat Towing 2004 Jeep Liberty
  • Since you installed the wiring on your 2004 Jeep Liberty a few years ago but never used it then the first thing to do is apply 12V power to each pin on the front of your Liberty to see if the lights function like they should. If they do then you know the problem is on your motorhome but if they don't then the problem lies with the wiring on your Liberty. Regardless which side it's on you'll want to use a circuit tester to test along the wiring to see where the signal gets lost. Making...
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  • Tips for Wiring a 2009 Volkswagen Jetta Wolfsburg Edition with a 4-Way Trailer Wiring Harness
  • What it seems to boil down to is if the vehicle has a 2 wire system or a 3 wire system. On a 2 wire system, you would ground the red wire with the white wire. This is because the stop and turn signal lights are combined on one circuit. On a 3 wire system, the turn signals are separate from the stop light so the wire needs to be connected to the dedicated brake light wire. What it sounds like is that the running light brown wire is getting connected to the wrong wire on the vehicle. VW...
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  • Troubleshooting No Left Turn Signal on T-1 Wiring Harness for a 2006 Jeep Liberty
  • If you are checking the harness, item # 118524, without the trailer hooked up and there is no power on the yellow left turn circuit coming out of the converter, then you will need to check the ground wire on the vehicle and be sure it is securely connected to a good ground point. Then check the connectors behind the taillights and be sure they are securely connected. If all checks out then your converter has shorted out somehow and will need to be replaced. If you are checking the yellow...
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  • Manual Override of Tekonsha Prodigy P2 Brake Controller # 90885 is Tripping Circuit Breaker
  • So from what you described, with your lights dimming and the circuit breaker tripping from use with the manual override you have an issue with a short or insufficient ground after your install of the Tekonsha Prodigy P2 Trailer Brake Controller # 90885. First check your ground connections, starting by verifying that the white ground wire is attached to the negative battery terminal on your Jeep. Also ensure that your 7-way is properly grounded to bare metal as this can also be the cause...
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  • Windows and Horn Do Not Work On a 2005 Jeep Liberty After Wiring Harness Installation
  • It sounds to me as if you have blown a fuse or fuses in some way. I would begin by dis-connecting any trailer or other item connected to the 4-Way connector on the vehicle. Once this is done use a circuit tester, item # PTW2993 if needed, to check the connector and see if the functions of the newly installed trailer connector are working. If the trailer wiring harness is not working, then I would disconnect the wiring harness from the vehicle completely. If this does not restore the window,...
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  • Troubleshooting Tail Light and Brake Light Issue When Using T-One Vehicle Wiring Harness # 118524
  • To pinpoint where the problem is actually occurring, I recommend using a circuit tester to check for function at the 4-Way plug on your 2007 Jeep Liberty, without your trailer connected. We offer part # PTW2993, if needed. With a helper in the cab of the vehicle and the taillights on, check to see if you get a power reading on the yellow and green wire ports when the turn signal is flipped or the brake pedal is pressed, as these would be the turn and brake signal wires. For example,...
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  • What Should Display on Primus IQ Trailer Brake Controller # TK90160 Show When Manual Button Pressed
  • A trailer brake controller like the Tekonsha Primus IQ # TK90160 will apply the brakes when you press the manual override lever with the same force as when you press the pedal. This force will be determined by the chosen power level and boost setting. The display message .C indicates that the controller has power, senses a connected trailer but does not have the boost feature engaged. When you engage the boost another dot will appear and you will see .C. When you press the manual lever...
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  • Recommended Replacement Brakes for 5000-lbs Horse Trailer with 15 Inch Wheels
  • If you've got 15 inch wheels on your horse trailer I believe you've likely got 12 inch brakes; you will want to confirm the capacity of your axle and the size of the hub and drums in order to make sure you get the right parts. To replace those, I recommend using the Electric Trailer Brake Kit - Self-Adjusting - 12" - Left and Right Hand Assemblies - 5.2K to 7K # AKEBRK-7-SA since they're a high quality self adjusting brake assembly; after the initial adjustments you won't need to do any...
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  • After Dealer Replaced Trailer Hitch on 2006 Jeep Liberty it Started Blowing Fuses
  • To determine if it is the wiring harness on your 2006 Jeep Liberty that is causing the problem you can perform some tests. Basically you would use a circuit tester such as # PTW2993 and test the wires going into the wiring harness converter box and the wiring coming out of the box. It helps to have someone in the vehicle to operate the lighting functions while you test the wires. If the converter box is not receiving the correct signals going into it from the vehicle then there is some...
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  • Troubleshooting Turn Signal Fuse Blowing on 2005 Jeep Liberty
  • The turn signal fuse blowing will be either due to a bad ground wire connection on your turn signals or a short in the wire. I don't believe that the wiring harness would cause that issue, but you may want to check the ground wire on that to make sure you have a clean bare metal to metal connection there as well. I recommend unplugging your # 118524 harness from behind that tail light and seeing if that fuse blows without the connection. If so, then you know the short is on the vehicle...
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  • Troubleshooting Flat-Towing Wiring Harness HM56203 for 2005 Jeep Liberty
  • First, make sure that all connectors for Hopkins 4-pole wiring harness # HM56203 are fully-seated together at the Liberty's tail lights and that the locking clips are engaged. Next, check the white ground wire to be certain it is tightly affixed to a clean bare metal spot on the car's metalwork. Sand off primer/paint and/or clean off any other material or contaminants that might prevent metal-to-metal contact. This ground wire is most often the cause for lighting issues like yours. You...
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  • Left Turn Signal Activates Both Tail Lights on Trailer
  • The most likely cause for both of the turn signals to flash when activating just the left signal is a bad or weak ground. A weak ground connection can cause a variety of strange things to happen with the trailer tail lights. I recommend checking that both the vehicle and trailer side connectors are free of any dirt or corrosion and simply clean as needed. Also make sure that the main ground is connected to a clean, bare metal surface on the trailer. Then check to make sure the trailer...
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  • 2012 Jeep Liberty Headlights Cause My Trailer Turn Signals and Brake Lights to Fail
  • It sounds like there may be a couple of issues going on here. First, It is very common for LED lights like # C7493RTM & # C7483RTM to remain on very dimly whenever the trailer is connected to a vehicle, even if the ignition is turned off. The only solution is to disconnect your trailer when you will be parked for extended periods. Now let's address the bigger issue. When turning on the vehicle's headlights causes one or more of the trailer lights to stop working the number one culprit...
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  • Trailer Brake Lights Not Working with a 2002 Jeep Liberty
  • Since the turn signals and brake lights are carried on the same circuits if the turn signals are working the brake lights should too. If they are not then it is likely a ground issue. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds...
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