Severe shaking problem towing behind motorhome - Page 57 - 2014+ Jeep Cherokee Forums
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post #561 of 576 (permalink) Old 02-25-2017, 02:09 PM
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Originally Posted by Monk View Post
My Cherokee has been a PIA but now seems to be OK with the kit. I added a relay in place of the toggle switch as discussed on this forum. It seemed like a great idea. Here is my experience and one last question for the forum. Sorry this is rather long but may help others with their Cherokee.

In North Carolina (my relay was still used in place of the toggle switch), the parking brake came as I hooked up on so I disconnected everything and started the process all over. Then the engine would not start and the dash display said "power steering service required" and various other strange things happened. A rollback took it to a dealer since it would not start. After staying unplanned for an extra week, the dealer said it suddenly started OK. They cleared a lot of error messages and it worked OK.

I believe my addition of a relay in place of the toggle switch caused part of the problem. It was triggered on at the same time as the under hood relay was energized. I believe both relays engaging at the exact same time created confusion on the network buss. I went back to the factory toggle switch and so far no problem except for the following observation:

Steering stays activated:
I noticed that the steering stays active for 17 minutes after the toggle switch is turned off and the relay under the hood is de-energized. I have seen others comment about this. I have avoided any ignition sequence to get it back to driving mode until the steering goes inactive. So far this has worked OK but the Jeep is often setting in the roadway for 20 minutes before I dare try to move it. I do not want to risk another incident as I believe starting the vehicle while the steering is still powered up may have been the cause of my issue in North Carolina.

I would appreciate others sharing their experience regarding the steering remaining active.
I too considered using relays but decided to follow the KISS principle. The only thing I did was include a switch in series with the harness fuse to eliminate pulling and reinserting that fuse. As you have observed, everything works fine every time.

I agree the relay may cause a timing issue with disconnecting the CAN bus connection at the same time the (EPS) electric power steering system is activated. Maybe a timer delay circuit would help. Regardless, the operating instructions are clear about waiting for the bus to sleep, flipping the switch in the center console box (CAN bus disconnect switch) and then activating the EPS.

The steering staying active is not a problem. For me it is actually helpful at times. I use a Blue Ox tow bar and when disconnecting it may bind up the pins if I have not got the KL lined up perfectly straight behind the MH. With that tow bar, if the wheels are turned away from the side of the bound-up pin, it unbinds it. So the EPS remaining on becomes an advantage in that situation.

The first two steps for shifting out of Neutral Mode is to deactivate the EPS and then flip the toggle down to reconnect the CAN bus connection. As long as those two steps are completed, you are good to go, regardless how long the EPS remains activated. I've never had a problem with it.

2015 White/Black Limited | 3.2-L V6 | Active Drive II | Tech Grp | Lux Grp | Trailer Tow Grp | SafetyTec | Uconect 8.4AN | 9 Speakers | Tonneau Cover | Born 09-06-14 : (( (( (( (( (( (( (( :
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post #562 of 576 (permalink) Old 02-25-2017, 04:50 PM
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Ensuring EPS is disconnected from CAN bus before energizing it

As mentioned above a separation of steps (via separate manual steps or some type of automatic delay) is needed to make sure the EPS is disengaged before power is applied.

My existing setup has power coming from the MH and a switch hidden in the cubby box left of the steering wheel to power on my auxiliary brake. It is the last thing I touch in setting up to tow. I intend to add to this switch the function to engage the EPS power relay. This will make the EPS setup automatic entirely through relays but still ensure the correct sequence.
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post #563 of 576 (permalink) Old 02-25-2017, 05:16 PM
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Thanks Array. If it has worked for you then I will try it. After all my problems I just don't want to be calling another rollback to tow it away again!
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post #564 of 576 (permalink) Old 02-26-2017, 10:24 AM
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I recall noticing the EPS stays active a bit after switching out of tow mode; never timed it. Within a few minutes we usually have the Jeep disconnected and moved out of the way.

... RP
2015 Trailhawk
CherryRed&Black, V6, Uconn8.4-Navigation
Comfort/Convenience, ColdWeather, TrailerTow pkgs
Ordered 8/6
Status D1: 8/13, F: 8/26, I: 8/27, KZ: 9/2, KZM: 9/3
Arrived at Dealer 9/10, 42 days from order date.
Took Delivery Sept. 12, 2014.
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post #565 of 576 (permalink) Old 03-10-2017, 02:30 PM
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thanks array

thanks array,
I just got my harness installed yesterday on my 2015 TrailHawk and noticed the steering stayed active and wasn't sure if that was normal. I did notice that after starting to verify normal operation, that as soon as I turn off the engine the steering was off also. (hard to turn steering wheel)

Did not have any problem when turning key on as soon as switch off and fuse pulled.

thanks -- wayne

Quote:
Originally Posted by Array View Post
The steering staying active is not a problem. For me it is actually helpful at times. I use a Blue Ox tow bar and when disconnecting it may bind up the pins if I have not got the KL lined up perfectly straight behind the MH. With that tow bar, if the wheels are turned away from the side of the bound-up pin, it unbinds it. So the EPS remaining on becomes an advantage in that situation.

The first two steps for shifting out of Neutral Mode is to deactivate the EPS and then flip the toggle down to reconnect the CAN bus connection. As long as those two steps are completed, you are good to go, regardless how long the EPS remains activated. I've never had a problem with it.
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post #566 of 576 (permalink) Old 03-10-2017, 05:17 PM
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thanks array,
I just got my harness installed yesterday on my 2015 TrailHawk and noticed the steering stayed active and wasn't sure if that was normal. I did notice that after starting to verify normal operation, that as soon as I turn off the engine the steering was off also. (hard to turn steering wheel)

Did not have any problem when turning key on as soon as switch off and fuse pulled.

thanks -- wayne
Glad to hear you're set up. Welcome to the forum.

Assume you are heading out I-10 on your trip? Last time we went west from FL headed to New Orleans, we stopped at Topsail Hill Preserve State Park RV Resort in Destin, FL and then cruised the shore to Gulf State Park in Gulf Shores, AL. Both Spectacular state parks.

Hope you have a great trip. Let s know how it goes and what you think about towing your TH.
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post #567 of 576 (permalink) Old 04-05-2017, 09:16 AM
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I was just told by @JeepCares that the harness is considered an accessory and I have to pay for it.

I traded in my old car and bought the 2017 TH specifically to tow - two days ago! The dealer knew nothing about this and I had to find the service notice for them (from this thread). I have read every page of this thread and went to sleep (late) last night thinking @JeepCares would help me like everyone else.

I really wish I could have loved my new Jeep, but this makes it very hard.

Is there anywhere else I can go to work with Jeep? How do I open a case with Customer Care?

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post #568 of 576 (permalink) Old 04-05-2017, 09:30 AM
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Quote:
Originally Posted by ddarpel View Post
I was just told by @JeepCares that the harness is considered an accessory and I have to pay for it.

I traded in my old car and bought the 2017 TH specifically to tow - two days ago! The dealer knew nothing about this and I had to find the service notice for them (from this thread). I have read every page of this thread and went to sleep (late) last night thinking @JeepCares would help me like everyone else.

I really wish I could have loved my new Jeep, but this makes it very hard.

Is there anywhere else I can go to work with Jeep? How do I open a case with Customer Care?
I don't believe there is anything that can be done. FCA stopped paying for the kits and installation last year after they made a change to the Jeep Manual. If you look in the Recreational Towing section it should state that the Mopar wiring kit is a required accessory to tow four down.

The reason JeepCares was able to help those of us with 2014-2015 and some early 2016's is because that requirement was not published in those model year manuals as they didn't yet realize, or admit, they had a problem.

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post #569 of 576 (permalink) Old 04-05-2017, 11:38 AM
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I could accept that if I was told it when I asked directly what the requirement was. I did my part and understood there was a need for a harness, I asked about it before buying. I actually said "I refuse to sign until I have the answer." The dealer searched for over an hour to get me an answer. I was told it was the harness I had to buy to connect my car to the RV and it had nothing to do with the dealership to install it. In fact, I was told they could not even order the part. The dealer made every effort, but the information was not available to them. Had I known all of this I could have considered that in my purchase or even negotiated with it. If this is going to be the stance FCA needs to be more upfront about it so that dealers can be upfront with customers.

My perspective: I was lied to by Jeep. As a result, 24hrs after spending over $30K on a car I am being hit for another $300 - $500.

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post #570 of 576 (permalink) Old 04-05-2017, 12:30 PM
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Originally Posted by ddarpel View Post
I could accept that if I was told it when I asked directly what the requirement was. I did my part and understood there was a need for a harness, I asked about it before buying. I actually said "I refuse to sign until I have the answer." The dealer searched for over an hour to get me an answer. I was told it was the harness I had to buy to connect my car to the RV and it had nothing to do with the dealership to install it. In fact, I was told they could not even order the part. The dealer made every effort, but the information was not available to them. Had I known all of this I could have considered that in my purchase or even negotiated with it. If this is going to be the stance FCA needs to be more upfront about it so that dealers can be upfront with customers.

My perspective: I was lied to by Jeep. As a result, 24hrs after spending over $30K on a car I am being hit for another $300 - $500.
Hi and welcome to the forum

Wow, sorry to hear that... From your description there, it sounds like miscommunication more than anything. From the get-go with these new harnesses, it has been very difficult to get clear information from FCA. Dealers often don't know anything, yet they should know. What a mess.

Can't say what your particular dealership knew or didnt know when you bought the Jeep. And I don't know if you have anything to use to go after that extra harness cost.

We do know that 2014-15 and some very early 2016 builds can get the harness installed for free, for reasons explained by @bobged above.

If your dealer has good ethics, they should help you with this harness now, in light of all the information they couldn't find. They had access to this information, they possibly just didn't know who to talk to, or they made very little effort to find the information...

I understand your frustration.

Perhaps you should contact @JeepCares and tell them your story. Who knows...

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