Is A Battery Charge Line Kit Required When Flat Towing A 2021 Jeep Grand Cherokee

Question

Question:

Please advice if I need to install a battery charger when the flat towing system installation. I was told by someone that its better to be installed to keep car battery longer. Is it true? What is your, as expert, recommendation? If it is, what is part# and name that I can order?

asked by: Sandy L

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Expert Reply:

Yes, I highly recommend using a battery charge line kit while flat towing your 2021 Jeep Grand Cherokee. Depending on the braking system you use you'll be pulling power directly from the vehicle battery and wouldn't want to run the risk of it depleting the battery while you're towing and then have the breaking system turn off or get to your destination and unhook your Jeep only to find the battery is too low to start.

If you aren't using a Brake Buddy System like the # HM39524 or # HM39530 that come with a battery charge line kit included you can use the Roadmaster Battery Charge Line Kit for Towed Vehicles # RM-156-25. This kit allows up to 15 amps from your RV's battery to be used to maintain the charge of your towed car's battery and will connect to the 6-way or 7-way plug on your vehicle. Note this will require Roadmaster's motor home battery line # RM-156-75, sold separately, if no charge line is present in your RV.

I've attached videos of each of these products to help you with installation as well.

If you haven't yet purchased all of the other flat towing equipment required I have the following recommendations for you:

Tow Bar: Roadmaster Falcon All Terrain, Non-Binding Tow Bar # RM-522. This tow bar features a non-binding design and large hookup radius that makes connecting and disconnecting from your base plates on any terrain a breeze.

Tow Bar Wiring Kit: Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267. This diode kit will allow you to use your Jeep Grand Cherokee's tail lights and wiring system while preventing feedback from your RV.

Note: If your Jeep has ParkSense proximity sensors you will need # RM47ZR instead.

Base Plate: The Roadmaster Direct-Connect Base Plate Kit - Removable Arms # RM-521440-5 you were already looking at are a great choice. The direct-connect attachment points make hooking up and disconnecting super easy and the ability to remove the arms when not in use will provide a clean look and save your shins when walking around the front of your Jeep. Note: This base plate will not fit SRT-8 and Trackhawk models. If you have either of those models let me know and I can find the correct fit for you.

Safety Cables: RoadMaster 68" Single Hook, Coiled Safety Cables - 6,000 lbs # RM-643. The coiled design of these cables will help prevent them from dragging on the ground and being damaged.

You may also require a high/low adapter to keep your tow bar level between your RV and Jeep. This will require some measuring so I've attached our help guide article to assist you in determining if an adapter is needed and which is the correct fit.

expert reply by: Kevin C

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Answer 1

It sounds like you're wanting to install a battery charge line on the Jeep to charge the battery while in tow and then run that through the 6 to 7-way umbilical. If that's the case we have just what you need, the Roadmaster Battery Charge…

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Answer 2

The SiriusXM Vehicle Satellite Radio Antenna #R169159 can mount almost anywhere in your vehicle. It has a magnetic base as well as the ability to be mounted to your window if you desire using whatever sticking product you choose. It is small and…

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Answer 3

The Brake Buddy Stealth part #HM39530 can only work with the included brake controller. You'd have to install the controller that comes with this to use it with the Stealth and then use your current controller when towing a trailer.

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Answer 4

It is completely normal for one of the pins on the Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar w/ LED Lights #RM-676 - or any tow bar, really - to be more difficult to remove. The reason is the amount of force on a tow bar, both when…

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Answer 5

Yes, the Roadmaster Nighthawk Tow Bar #RM-676 does come with the 6-pin receptacle and mounting bracket; you can see this in the accompanying photo I've added which shows that particular part. This is a very unique tow bar that has wiring and…

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Answer 6

The Roadmaster D-Ring adapter part #RM-035 will fit on the Roadmaster Nighthawk #RM-676 tow bar that you also referenced.

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Answer 7

The Demco SBS Wireless Coachlink for Supplemental Braking Systems #SM99945 does provide some peace of mind that your towed vehicle brakes are getting applied so that you know for sure that your braking system is working. Some braking systems have…

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Answer 8

The arms of blue ox base plates will not fit the Roadmaster base plates for your 2020 Jeep Gladiator, the Roadmaster Direct-Connect Base Plate Kit #RM-521453-5. However, if that was something you wanted because you had a Blue Ox tow bar, you can…

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Answer 9

The Blue Ox has a life expectancy of 8-10 years, Blue Ox does recommend replacing it at this point. There are a few big differences between the Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar w/ LED Lights - RV Mount - 8K #RM-676 and the Blue…

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Answer 10

I have a solution for you, but no the etrailer Invisible Base Plate Kit item #e98950 is not confirmed to fit your 2021 Jeep Grand Cherokee. However, the Demco Tabless Base Plate Kit item #DM9519291 is confirmed to fit your vehicle. This is a…

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Answer 11

When installing the SMI Air Force One Supplemental Braking System For Motor Homes with Air Brakes #SM99243 you will need to find the supply air line and the metered air line. On the Dutchcraft motor home on the Spartan Chassis the larger 5/8 inch…

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Answer 12

In order to use a hitch-mounted bike rack like the Swagman Original #S64152-2 that you were looking at while towing a vehicle, you will just need to add the Roadmaster Dual Hitch Receiver Adapter #RM-077-4. This adapter will slide into the 2 inch…

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Is A Battery Charge Line Kit Required When Flat Towing A 2021 Jeep Grand Cherokee

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