Help setting up 2019 Jeep Wrangler as a toad

jawzilla

jawzilla

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Hello,

I have looked on this forum and youtube for answers.

Just got a new to me 2019 Jeep wrangler Unlimited Sport 4dr. I purchased a Blue OX bx1139 tow bar and have it installed.
Also purchased the roadmaster invisibrake system INVISIBRAKE SUPP. BRAKING SYS.
I will install that as soon as I can get all the wiring I need so I can tackle it all at once.

Looking at various wiring harnesses, none seem to have the 6 pin round connecter for the connection from The RV to the toad. They are all 4 pin flat. I've been looking at the Curt harness that appears to be plug n play except no 6 pin connector. Custom Towed-Vehicle RV Wiring Harness, Select Jeep Wrangler JL, Gladiator.

My goal is to install a battery charger for the toad at some point.

Do I need this as well? Dinghy Towing Electrical Adapter (4-Way Flat Vehicle to 6-Way Round)

If anyone has a better suggestion, please let me know.
 
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I set up my 2001 Wrangler TJ for flat towing... maybe 3 years ago??
It's not "Unlimited" like yours, actually quite "limited" due to it's age :) .

I wanted a turnkey setup when towing - just hitch and go. This required a little more upfront effort, like the InvisiBrake and the diode kit and relay for the Jeep's brake lights. Some of those items may not be compatible with newer Stellantis manufactured Jeeps. Check with E-Trailer.

I also installed a toggle switch on the Jeep firewall which I ran the power to the InvisiBrake through. This is to cut power to the InvisiBrake when not in tow mode. Just an added layer to prevent stupid things from happening.

The charge line runs through the 7-pin motorhome connector to the "Light Socket for Towed Vehicle" listed below. It connects to the Jeep battery... I've NEVER had any issues whatsoever with the Jeep battery depleting, even after many hours of towing.

Anyway, these are the items I bought to complete the job. The baseplate and towbar are completely different, so I didn't list those.

Auxiliary Braking System
Roadmaster 8700 Invisibrake Hidden Power Braking System $840
Includes breakaway cable
Amazon

Light Wiring
Roadmaster 15267 All-In-One light wiring kit $130.44
Coiled power cord
Wire
4 diodes
Amazon

Light Socket for Towed Vehicle
Blue Ox light socket BX294-0902 $12.95
Compatible with Blue Ox Baseplate mounting
Etrailer.com - free shipping

Brake Light Relay
Roadmaster Brake-Lite Relay Kit $33.06
Amazon

Here's an E-Trailer video explaining the 6-Pin connector which carries your towed battery charge line...

 
Last edited:
I recently had our 2025 Dodge Durango AWD R/T set up to be flat towed behind our 2022 Thor Miramar 37.1. I ordered and gave the shop the tail light wire kit that included the diodes for the tail lights and a battery charge line kit to keep my battery charged while being towed. The battery charge line kit gets it's power from the 7 pin round motor home connector. I ordered and gave the shop the blue ox base plate kit for my Dodge Durango. I also had the shop install my Demco Stay N Play Duo braking system on the Dodge Durango. I removed it from my previous two vehicle and bought the re-install kit for the Demco Stay N play braking system. I already had the Blue Ox Alpha 2 tow bar. Everything works great.

Paul
 
Note: I forgot that the Roadmaster wiring kit I listed above INCLUDES the 6-pin connector... so the extra light socket connector I listed is unneeded.

I wound up with two...
 
Chateau_Nomad said:
I set up my 2001 Wrangler TJ for flat towing... maybe 3 years ago??
It's not "Unlimited" like yours, actually quite "limited" due to it's age :) .

I wanted a turnkey setup when towing - just hitch and go. This required a little more upfront effort, like the InvisiBrake and the diode kit and relay for the Jeep's brake lights. Some of those items may not be compatible with newer Stellantis manufactured Jeeps. Check with E-Trailer.

I also installed a toggle switch on the Jeep firewall which I ran the power to the InvisiBrake through. This is to cut power to the InvisiBrake when not in tow mode. Just an added layer to prevent stupid things from happening.

The charge line runs through the 7-pin motorhome connector to the "Light Socket for Towed Vehicle" listed below. It connects to the Jeep battery... I've NEVER had any issues whatsoever with the Jeep battery depleting, even after many hours of towing.

Anyway, these are the items I bought to complete the job. The baseplate and towbar are completely different, so I didn't list those.

Auxiliary Braking System
Roadmaster 8700 Invisibrake Hidden Power Braking System $840
Includes breakaway cable
Amazon

Light Wiring
Roadmaster 15267 All-In-One light wiring kit $130.44
Coiled power cord
Wire
4 diodes
Amazon

Light Socket for Towed Vehicle
Blue Ox light socket BX294-0902 $12.95
Compatible with Blue Ox Baseplate mounting
Etrailer.com - free shipping

Brake Light Relay
Roadmaster Brake-Lite Relay Kit $33.06
Amazon

Here's an E-Trailer video explaining the 6-Pin connector which carries your towed battery charge line...

Click to expand...
Nomad, Thanks for the info.
Sounds like the answer to my question is yes I need that particular device or something similar.

I did see this particular outfit, but they were pretty pricey that had a cut off switch. JL/JT Tow Harness Kit
 
paulwadley said:
I recently had our 2025 Dodge Durango AWD R/T set up to be flat towed behind our 2022 Thor Miramar 37.1. I ordered and gave the shop the tail light wire kit that included the diodes for the tail lights and a battery charge line kit to keep my battery charged while being towed. The battery charge line kit gets it's power from the 7 pin round motor home connector. I ordered and gave the shop the blue ox base plate kit for my Dodge Durango. I also had the shop install my Demco Stay N Play Duo braking system on the Dodge Durango. I removed it from my previous two vehicle and bought the re-install kit for the Demco Stay N play braking system. I already had the Blue Ox Alpha 2 tow bar. Everything works great.

Paul
Click to expand...
Thanks Paul,

It may come to me handing it over to a shop, but gonna try anyway. My 1st one, so trying to figure it out, in case a problem occurs. Demco was in the running.
 
The most physically challenging part on mine was installing the baseplate. I got my son to help with the grunt work on that. All the rest was just like any other typical upgrade/modification. Could be done in a weekend, but I puttered around for the best part of a week.

In the process I saved about half the cost... AND now I know exactly how everything works. So if I'm out on the road with a problem, I know where to troubleshoot. Knock on wood... it's been flawless.
 
A pic of what I have so far which isn't much. I did not have a helper so I used a box that has my lithium battery in it to support one side while put a bolt on the other side.
 

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Ok, so I decided to go with this from Curt since I already have the coiled cable and it is cheaper and not as much splicing and diode work.
.

CURT 58964 Custom Towed-Vehicle RV Wiring Harness for Dinghy Towing​

In combo with this.

CURT 58130 Vehicle-Side 6-Pin Round Trailer Wiring Harness Socket​


So i have already installed a Hitch and wired it similar using this memco unit.

MECMO 56407 4-Pin Trailer Wiring Harness for 2018-2025 Jeep Wrangler JL​


I went with the memco so I did not have to splice and deal with the diodes.

My question is can I just install the Curt wiring unit behind the Memco taillight plug so it would be Taillight -> Memco -> Curt ?
Or should it be Taillight -> Curt -> Memco?
 
Not sure I understand where you're fitting the 4-pin into the setup? Looks like that's for towing a trailer with your Jeep. ??

As far as diodes, etc. your Jeep may use CAN Bus in the wiring (mine's old fashioned and doesn't). This changes how you do the brake light wiring so as not to interfere with the CAN Bus.

I suggest you contact E-Trailer and see if they can guide you?
 
Chateau_Nomad said:
Not sure I understand where you're fitting the 4-pin into the setup? Looks like that's for towing a trailer with your Jeep. ??

As far as diodes, etc. your Jeep may use CAN Bus in the wiring (mine's old fashioned and doesn't). This changes how you do the brake light wiring so as not to interfere with the CAN Bus.

I suggest you contact E-Trailer and see if they can guide you?
Click to expand...
Thanks, query sent into Curt.
 
Curt replied and said, Vehicle side plug---->Curt 58964---->MECMO 56407---->Taillight.

Curt also makes Custom Towed-Vehicle RV Wiring Harness Add-On #58920 that I did not know about and could have used that instead of the MECMO. Anyway, all hooked up and everything working perfectly. Now on to the Invisibrake install.

This is probably the best video I have found on the install for 2019 jeep wrangler.
 
Also, I did not purchase the roadmaster 751490 Brake Light Switch Kit. However, I'll run the wiring for the future in case I change my mind.

Thoughts? Anyone used the stop light switch or go with another method of indication that the toad brakes are engaged?

I like that the brake light switch can use a an unused pin in the 6 pin harness and no extra little wire to mess with when hooking up.

https://www.amazon.com/Roadmaster-7...d=1746875577&sprefix=RM-751490,aps,224&sr=8-3​

 
I'm of the mindset of do a little extra work up front with the install. Then the hitching process is dead simple. The fewer steps, the less that might be missed. Mine's a 5 minute process... just hitch up and plug in.
 
Well after installing, the invisibrake is engaged for 15 sec no matter how long or short I push the MH brake. Also noticed that when not connected to MH for normal driving, the invisibrake activates in the same manner. So it sounds like I will need to splice in the diode's after all?
 
Did you adjust the sensitivity knob on the box? I think the instructions gives a starting point, but it may be too much for yours? I actually increased mine a little.

I also installed a toggle ON/OFF switch in the InvisiBrake power line... mounted on the Jeep firewall. When not towing that switch is OFF... no power to InvisiBrake box means no way it can activate.

Side note... I always pull the emergency disconnect switch out every time I hook up to make sure it activates.

P.S. Side note #2... Be sure your emergency disconnect cable is shorter than your safety chains (cables). Otherwise if the towed disconnected for any reason, the disconnect cable won't extend enough to "pull the plug" and activate the towed vehicle brakes.
 
Chateau_Nomad said:
Did you adjust the sensitivity knob on the box? I think the instructions gives a starting point, but it may be too much for yours? I actually increased mine a little.

I also installed a toggle ON/OFF switch in the InvisiBrake power line... mounted on the Jeep firewall. When not towing that switch is OFF... no power to InvisiBrake box means no way it can activate.

Side note... I always pull the emergency disconnect switch out every time I hook up to make sure it activates.

P.S. Side note #2... Be sure your emergency disconnect cable is shorter than your safety chains (cables). Otherwise if the towed disconnected for any reason, the disconnect cable won't extend enough to "pull the plug" and activate the towed vehicle brakes.
Click to expand...
Thanks, I will check the pressure today. It is set to 60 psi which is what they called for for this vehicle.

I will also recheck the tail light harness connection to make sure it is Vehicle side plug---->Curt 58964 (diodes installed)---->MECMO 56407---->Taillight.

On/off switch is going to happen. Right now I just pull the power plug from the controller.
 
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