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Expert Answers about Jeep JL Wrangler


  • Will the Battery On a 2018 Jeep JL Wrangler Drain While In Tow Using the Roadmaster BrakeMaster
  • The Roadmaster BrakeMaster System part # RM-9160 will not drain the battery on your 2018 Jeep JL Wrangler becuase the main air cylinder is powered via vacuum. If you like, you can install the Roadmaster Battery Charge Line Kit part # RM-156-25 which will provide a charge to the vehicle's battery while in tow but this should not be needed. However, you will need a seat adapter to use the BrakeMaster on your Wrangler, the RoadMaster BrakeMaster Custom Seat Adapter part # RM-88130 for four...
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  • How to Order 4 SnapPads for 10 inch Octagon Jack Feet
  • If you wanted to order 4 of the SnapPads for 10 inch Octagon or Round jack feet you'd need to order a quantity of 4 of the part # SP84FR and you'd be set.
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  • Kayak Load Assist for Jeep Wrangler Roof
  • I have a few solutions for you. The first one is using your current roof rack and kayak carrier setup while using a step assist like Powerbuilt Adjustable Tire Step # ALL647596. This gives you a large step that attaches to your tire to help with loading and unloading of your kayaks. The Rightline Gear Moki Door Step # RL100660 is another option. It hooks into your door's latch and provides a step to give you better access to your roof. This style is nice because it allows you to reach...
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  • Base Plate and Parts to Flat Tow 2019 Jeep Wrangler with Steel Bumper
  • We have base plate kits that fit your 2019 Jeep Wrangler Rubicon with the factory steel bumper like with the Roadmaster Direct Connect part # RM-521453-5 but at this time there are no Blue Ox options. In addition to the base plates, you will also need a compatible tow bar, safety cables, lighting, and supplemental braking to flat tow your vehicle. The most popular compatible tow bar is the Falcon All Terain, # RM-522. This has non-binding arms which makes the setup very easy to connect/disconnect. For...
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  • Troubleshooting Trailer Wiring Running Lights Not Functioning After Wiring Install
  • Sonds like the problem is the trailer wiring kit part # C56407 that you referenced. Typically when this happens if you unplug and replug the connectors of the kit back in the circuit will make the appropriate contact and the circuit will come back on. So what you'll want to do if that does not fix the problem is use a circuit tester like # PTW2993 to test the brown wire that comes off of the connector than runs to the left taillight (one with yellow wire) to see if there is voltage there...
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  • Brake Controller Install Harness Recommendation for 2018 Jeep Wrangler
  • Yes, I confirmed with Curt that the trailer wiring install harness part # C51458 that you referenced is a confirmed fit for your 2018 Jeep Wrangler and will make installing a brake controller easy. It will plug right into the port under the dash of your vehicle to make installing the brake controller easy.
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  • Parts Needed to Flat Tow 2021 Jeep JL Wrangler Unlimited
  • The first thing you need is a base plate kit for the 2021 Jeep JL Wrangler Unlimited like the Roadmaster Direct Connect part # RM-521453-5 which is the easiest to use base plate kit that fits your vehicle. In addition to the base plates, you will also need a compatible tow bar, safety cables, lighting, and supplemental braking to flat tow your vehicle. The most popular compatible tow bar is the Falcon All Terain, # RM-522. This has non-binding arms which makes the setup very easy to connect/disconnect. For...
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  • Recommended Towing Mirrors for 2018 Jeep JL Wrangler
  • I recommend using the CIPA Universal Towing Mirrors - Clip On - Qty 2 # 7070-2, which are a strap on, universal fit mirror that will work on the 2018 JL. These mirrors use heavy duty textured rubber straps to provide a tight and secure fit on your mirrors that will also help reduce vibration. I've linked a short review video of these on a Jeep Gladiator which has the same type of mirrors, so it should give you a good idea as to how they'll look and fit.
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  • Availability of Plug-In Brake Controller Harness for 2018 Jeep JL Wrangler
  • I spoke with my contact at Tekonsha and unfortunately there is not yet a plug-in brake controller harness available for your 2018 Jeep JL Wrangler Unlimited. They are still working on fitting and developing the harness for the JL model but it is not yet available and he wasn't sure when it would be. Most likely a plug-in harness will come out at some point but in the meantime your only option to install a brake controller like the Prodigy P3 # 90885 is to hardwire it like you mentioned....
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  • Can Go Power Retreat Solar Charging System Controller # 34272635 Work with 12 Volt Battery Bank
  • Yes the Go Power Retreat Solar Charging System with Digital Solar Controller # 34272635 is designed for use with 12 volt battery banks like what you have so it would fit and work great.
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  • Pro and Cons of Air Bags Versus a Weight Distribution System for a 2018 Jeep JL Wrangler
  • For your 2018 Jeep JL Wrangler, I recommend using a weight distribution system, the Husky Center Line Weight Distribution part # HT32215 for 2" hitch ball or part # HT32216 for 2-5/16" hitch ball. The main reason I recommend a weight distribution system over airbags like the Air Lift AirLift 1000 Air Helper Springs for Coil Springs part # AL60829 is because the weight distribution system has integrated sway control. Now, you may not think that because you have a light trailer that trailer...
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  • Will Roadmaster InvisiBrake Work on 2021 Jeep JL Wrangler with EcoDiesel
  • I check with Roadmaster and the Roadmaster InvisiBrake Supplemental Braking System part # RM-8700 will be a great option for a 2021 Jeep JL Wrangler with EcoDiesel. They stated they don't typically recommend this for diesel engines but there is electric brake assist on these so it will still work. It will however require the Roadmaster Stop Light Switch Kit part # RM-751490 for proper operation.
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  • Availability of Tow Bar Wiring Kit 58964 Is this the sa
  • That part number is actually a Curt tow bar wiring harness which is our part # C96JR.
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  • Installing Trailer Wiring Harness on 2018 Jeep JL Wrangler Thats Also Wired for Flat Towing
  • You can absolutely install the Tekonsha T-One Vehicle Wiring Harness # 118786 (which is indeed the correct harness for your 2018 Jeep JL Wrangler) on your vehicle that already has a Blue Ox Diode Kit installed for flat towing. The two kits won't interfere with each other and won't cause any type of issue with regards to the electrical system on the Jeep. When installing the T-One Harness you will follow the attached instructions just like normal, connecting the plugs to the factory ports...
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  • Troubleshooting Trailer Wiring of Jeep Where Only 12 Volt Accessory Circuit Works
  • Typically this problem is caused by corrosion or dirt on the trailer wiring pins. I'd first try cleaning all of the pins of the 7-way with sandpaper and make sure none of them are bent or damaged. Other place to check is fuses under the hood of the vehicle if the wiring is OEM. You can also check to make sure the wiring behind the connector isn't damaged. I attached a link to a page that covers trailer wiring troubleshooting for you to check out as well.
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  • Demco Base Plate Kit for 2018 Jeep JL Wrangler Rubicon with Steel Bumper
  • Yes, the Demco Tabless Base Plate Kit # DM9519339 that you referenced is confirmed to fit your 2018 Jeep JL Wrangler Rubicon with the factory steel bumper and it will work great. In order to flat tow your Jeep you will also need a compatible tow bar, safety cables, a lighting solution, and a supplemental braking system. Just in case you still need some or all of these components I will list my recommendations below. Tow Bar - Demco Excali-Bar III # DM9511013 (safety cables are included!) Lighting...
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  • How To Carry Two Kayaks On a 2018 Jeep JL Wrangler Unlimited
  • In order to carry two kayaks on a 2018 Jeep JL Wrangler Unlimited you'll need a roof rack, the Thule SquareBar Crossbar System part # TH712500 and part # TH65BJ is what I recommend. The roof rack will allow you to properly distribute the weight of the kayaks on the roof. In order to secure the kayaks you'll need to do so on their side with a j-style carrier. I recommend the etrailer J-Style Kayak Carrier part # e98878 which comes with everything you need including tie-downs. In order to...
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  • Trailer Wiring Harness Recommendation for 2018 Jeep Wrangler JL
  • The trailer wiring harness I recommend for your 2018 Jeep JL Wrangler 4-cylinder is the Tekonsha kit part # 118786 that you referenced. This is a custom fit harness which means it will install easily and it comes with a very reliable converter box so it will last a long time too. I attached an install video for this kit on a 2018 JL just like yours for you to check out as well.
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  • How to Move SMI Air Force One Braking System to New Vehicle
  • To use your existing SMI Air Force One Supplemental Braking System # SM99243 in your new vehicle all you need is the Replacement Towed Vehicle Installation Kit # SM99226. This kit includes the installation hardware you need for just the towed vehicle side of your setup so you can move the system over to your new vehicle.
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  • Trailer Wiring Harness that Fits 2018 Jeep Wrangler
  • For your 2018 Jeep Wrangler JL the best trailer wiring kit is the part # C56407. I attached an install video for this for you to check out as well.
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