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Discussion Starter · #1 ·
Can someone that has trailer tow on their 2019+ cherokee (@Flybynightcru) go to their build sheet and list all the sales code options that are tied to trailer towing? I want to make sure I know the right ones. It may just be "AHT". Based on my internet research there is also an "AHC" code for some vehicles instead of the AHT.

I also see XEY "Trailer tow wiring harness" and XFU "Trailer tow w/4 pin connector wiring" online.
 

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2019 Trailhawk Elite 2.0T Olive Green Metallic Pearlcoat
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Can someone that has trailer tow on their 2019+ cherokee (@Flybynightcru) go to their build sheet and list all the sales code options that are tied to trailer towing? I want to make sure I know the right ones. It may just be "AHT". Based on my internet research there is also an "AHC" code for some vehicles instead of the AHT.

I also see XEY "Trailer tow wiring harness" and XFU "Trailer tow w/4 pin connector wiring" online.
I will look. Please refresh my memory of where we find the build sheet info again???馃槑
 

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Yellow is the Trailhawk...
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I think the AHC code is the Trailer Tow "ready" option
 

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Discussion Starter · #9 ·
I took it to the dealer today and now when I log into mopar.com when I go to vehicle equipment, under dealer installed it says "trailer tow group" so I assume I am good with the sales code.

However, the service guy said that when they checked the car the trailer already worked and the software was up to date. So I am concerned they didn't enable the trailer tow in the BCM. I will now need to connect up alfaOBD and check myself and if not done right bring it back to have them do it for real. Why does everything need to be so complicated lol
 

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I took it to the dealer today and now when I log into mopar.com when I go to vehicle equipment, under dealer installed it says "trailer tow group" so I assume I am good with the sales code.

However, the service guy said that when they checked the car the trailer already worked and the software was up to date. So I am concerned they didn't enable the trailer tow in the BCM. I will now need to connect up alfaOBD and check myself and if not done right bring it back to have them do it for real. Why does everything need to be so complicated lol
If the dealer told you the software was up to date then you should be good to go. They said they checked the tow and it worked which for them might be as simple as plugging in a tester for the 4 prong trailer connector. In a proper install it has to be wired into the fuse block section specifically for the trailer wiring. That puts it into a dedicated circuit. Thus the need for software adjustment.
As far as the brake part of the Trailer wiring you could just buy a prodigy unit and hook it up and see if you are getting power to that unit. That is if you plan on towing with a trailer with brakes. Otherwise it is a mute point.
There are inexpensive 4 prong testers available from stores or on line. You can also get a adaptor for the round 7 pin connector and use that 4 pin connector to test its power output.
 

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Discussion Starter · #11 ·
If the dealer told you the software was up to date then you should be good to go. They said they checked the tow and it worked which for them might be as simple as plugging in a tester for the 4 prong trailer connector. In a proper install it has to be wired into the fuse block section specifically for the trailer wiring. That puts it into a dedicated circuit. Thus the need for software adjustment.
As far as the brake part of the Trailer wiring you could just buy a prodigy unit and hook it up and see if you are getting power to that unit. That is if you plan on towing with a trailer with brakes. Otherwise it is a mute point.
There are inexpensive 4 prong testers available from stores or on line. You can also get a adaptor for the round 7 pin connector and use that 4 pin connector to test its power output.
No it's more complicated than that in my case. I am planning to install the "factory" wiring harness which goes to a different connector than that "official mopar" dealer installed harness. That connector is only powered if they enable the option in the vehicle BCM.
 

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No it's more complicated than that in my case. I am planning to install the "factory" wiring harness which goes to a different connector than that "official mopar" dealer installed harness. That connector is only powered if they enable the option in the vehicle BCM.
Did I miss something??? I thought you did all that a long time ago???馃槑
 

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Discussion Starter · #13 ·

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Does one required a dealer trip to add the AHT sale codes to enable trailer tow in the BCM, or can AlfaOBD be used?

I have AlfaOBD, but I do not see any enabling options for the trailer lights, so I am assuming after adding the AHT sale code, those options become available.

Thanks, Glenn
2019 Trailhawk Elite, 2.0T
 

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I finally went to the dealer and added the AHT sales code, and had them enable my trailer lights. Afterwards, I did another BCM scan with AlfaOBD, but didn't see any obvious change. I do not think AlfaOBD has the feature / car configuration option, for enabling trailer lights on a 2019 TH Eliter, 2.0T.
 
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