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  #1069  
Old 08-02-2014, 05:01 AM
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But why should the brake lights come on at all? The manual overide activates the trailer brakes only, so it is the trailer that is braking and not the vehicle.

You guys just want both brake lights to come on so you can make tailgaters sh!t themselves when you hit overide and don't have a trailer on.
Sounds like fun, maybe I'll fix mine up.
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  #1070  
Old 08-02-2014, 07:02 AM
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Re: The Towing thread

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Originally Posted by Bigskiddy View Post
But why should the brake lights come on at all? The manual overide activates the trailer brakes only, so it is the trailer that is braking and not the vehicle.

You guys just want both brake lights to come on so you can make tailgaters sh!t themselves when you hit overide and don't have a trailer on.
Sounds like fun, maybe I'll fix mine up.
An interesting question actually. I think I have read in this thread (many many pages ago) that GC owners have determined that the brake lights are NOT activated by the Trailer Sway Control (TSC), Active Cruise Control (ACC) nor the Collision Avoidance (CA) braking systems, so why should the Trailer Brake controller override function have to? At the end of the day, in all cases the vehicles brakes are being applied. (I understand that in the TSC situation, only selected wheels are being braked, not all four.)

But I can assure you the ACC and CA systems can apply the brakes hard, and following vehicles would only be alerted to the Jeeps sudden deceleration by their closing speed.

And that makes no sense to me. Are we sure the GC's brake lights aren't activated in these (ACC and CA) situations?

Gr8Ness

Apologies if this has been answered, but I'm sure someone will direct me to the relevant thread/post.
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  #1071  
Old 08-02-2014, 07:49 AM
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Re: The Towing thread

The brake lights definitely come on with ACC braking, though not deceleration or downshift.
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  #1072  
Old 09-03-2014, 06:53 AM
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Re: The Towing thread

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Hi All,
It's my first post and have read this thread bar about 10 pages. My eyes hurt!v I've had my GC for about a month and a half and love it. Its a Laredo diesel with leather seats and a sunroof. I've also got a tow bar, Anderson plug and P3. I use it to tow a 16'6" horse float that weighs about 1700 empty. I had the dealership install the P3 and there are problems with it. The dealership has been great to deal with and I do believe that they can't find a problem. I've been told to take both float and car to an auto sparky and they'll cover the cost.

The problem is the one mentioned re lights. To start with the tail and running lights normally work , then they just turn off. The brake lights, stop lights and indicators still all work. A couple of times the running and tail lights went out when I released the foot brake. Other times they just went out as I was driving along.

Can anyone tell me definitely what is causing the problem? I also need the details of a good auto sparky in the south east of Melbourne. I'm happy to take the float and travel within reason so I can get it sorted once and for all!

Many Thanks,
HGM
Hi all,

Well the problem has finally been diagnosed. I've been a bit tardy with getting it look at as no night towing has happened. My float has filament lights and the MY 14 has LEDs. The Jeep tries to operate the lights hence they're on. Then it's too much for it as not enough power and the lights go off. This is in layman terms of course! I'm betting a box fitted in the back of the Jeep tomorrow and all should be.good.

The really disturbing thing the auto guy found was that the point/outlet on the car is defective. The no. 2 pin which charges the break away unit only charges when the car is in reverse. I've been hauling a 1.7T float and 1.2 T of expensive horseflesh around with no emergency braking on the float!!! Worst of all I've had other peoples' kids and horses on board. I rang City Jeep & their guy was pretty horrified, said the looms come pre wired and they just fit them. I'm going to insist they cover the full cost of the work I need done especially in light of the defects.
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  #1073  
Old 09-03-2014, 07:04 AM
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Re: The Towing thread

Pin 2 of a 7 pin plug or socket is actually meant to be the reverse wire. The installers deserve credit for actually connecting it at all, as many do not.

So it sounds like your trailer is incorrectly wired... which is fine as long as the installers know to wire the car incorrectly too.
;-)
I suggest you change over to a 12 pin configuration and avoid the pitfalls of a "custom" arrangement.

Cheers,
Steve
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  #1074  
Old 09-03-2014, 08:10 AM
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Re: The Towing thread

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Originally Posted by Barboots View Post
Pin 2 of a 7 pin plug or socket is actually meant to be the reverse wire. The installers deserve credit for actually connecting it at all, as many do not.

So it sounds like your trailer is incorrectly wired... which is fine as long as the installers know to wire the car incorrectly too.
;-)
I suggest you change over to a 12 pin configuration and avoid the pitfalls of a "custom" arrangement.

Cheers,
Steve
Oh hell, please tell me you're not serious?! Maybe I misunderstood what I was told, which is quite possible. The float has been checked and is ok but I'll get the auto electrician to ring the manufacturer to make sure there's not a mess up. The manufacturer is a very reputable maker and I've never heard of there being problems with wiring. Something like this would be public knowledge in the horses world! I haven't seen a 12 pin plug before. Would I still be able to tow something with 7 pins or would I need an adapter? Thanks

Edit: Have looked the 12 pin up and my Pajero had one. Is it possible to fit one to the Jeep without too much mucking around? Thanks for all your help!
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  #1075  
Old 09-03-2014, 08:26 AM
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Re: The Towing thread

Dont stress horseygirl your trailer manufacturer im guessing has done the right thing, in our industry the reverse pin is very rarely used, he would have used that pin as a spare to charge your breakaway battery, perfectly normal but as stated above the jeep dealer has done by the book and wired the pin according to standards, easy fix for an auto elec or garage. They just need to swap out the reverse input for a 12v input from the battery.
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  #1076  
Old 09-03-2014, 09:26 AM
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Re: The Towing thread

In my industry, you follow standards which impact compatibility and general safety. I guess there might be a situation where due to some insurmountable problem I might consider bending the rules, however not being arsed to go and buy the right connector doesn't really make it into this category.

As evidenced, unless the end user is aware of the deviation from standards and only tows with an appropriately mis-wired car, a correctly wired car will only charge the breakaway system when in reverse. Also, a breakaway system can potentially draw more current than a typical reverse light circuit can provide, so might take out that fuse. This may service other vital circuits.

Conversely, an incorrectly wired car will permanently illuminate the typically white reverse lights on the rear of a fully equipped trailer. This is obviously not a safe scenario either.

I'm no nanny for following rules just because some bureaucrat said to, but I don't agree this use of a 7 pin connection is an acceptable practice simply because a lot of trailers are not equipped with reverse lights. The horse trailer guy is a cowboy and should stick to welding stuff.

Cheers,
Steve
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  #1077  
Old 09-03-2014, 09:40 AM
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Re: The Towing thread

Oh, and regarding your question... the 12 pin socket for the car is designed to accept 7 pin plugs, so towing a small trailer requires no adaptor. You just plug into the row of 7 pins.

There simply isn't any reason to make fruit salad of these wiring standards :-)
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  #1078  
Old 09-03-2014, 05:02 PM
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Re: The Towing thread

Steve can I ask your profession?
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Old 09-03-2014, 09:10 PM
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Re: The Towing thread

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Originally Posted by HorseyGirlsMum View Post
Oh hell, please tell me you're not serious?! Maybe I misunderstood what I was told, which is quite possible. The float has been checked and is ok but I'll get the auto electrician to ring the manufacturer to make sure there's not a mess up. The manufacturer is a very reputable maker and I've never heard of there being problems with wiring. Something like this would be public knowledge in the horses world! I haven't seen a 12 pin plug before. Would I still be able to tow something with 7 pins or would I need an adapter? Thanks

Edit: Have looked the 12 pin up and my Pajero had one. Is it possible to fit one to the Jeep without too much mucking around? Thanks for all your help!
As Barboots stated, a 7 pin trailer plug will easily fit a 12 pin Receiver plug.
The 12 pin has the standard 7 pin layout on the top row, with an additional 5 pins on the lower row.
Although an non-standard wiring layout may work between a car and trailer, it is important to stick to the standard layout in case you ever want to hitch up a different trailer. Providing all stick to that standard, all is well and you should be able to hook up just about any trailer, providing they have been wired to the common standard.
I suggest you swap to a 12 pin, and ask a auto electrician to check both trailer and car for compatability.
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  #1080  
Old 09-03-2014, 09:36 PM
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Re: The Towing thread

like i said speaking from within the industry 7pin trailer plugs very rarely use the reverse pin for a reverse light (yes even though there is a standard for it), most trailer manufactures use this pin as an accessory pin ie. (to charge breakaway batteries or run something else). as with towing any trailer it is up to the individual owner to check there own systems for compatability i see this everyday so im speaking from genuine workshop experience.
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