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  #277  
Old 09-17-2013, 07:58 PM
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Re: The Towing thread

Ha, this is interesting. It's not surprising to me to see issues like this as car's become more CAN based. On only cars, the same "brake wire" went from the pedal, to the lights, also to the trailer plug. Now, it is presumably transmitted from the pedal to the lights via CAN. What may happen is that the left and right sides have a separate ECU (or output pin on the same ECU). When the brake controller is connected to this line and the override is activated, it can turn on the light for the side it is connected to only. It won't proper-gate back to the CAN bus.

As I understand it, all common trailer plugs have only one wire for the brake lights. So, to me, the important question is, when you trailer is connected, and you override, do the brake lights come on? As long as that is the case, I think it should be ok.
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  #278  
Old 09-17-2013, 08:15 PM
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Re: The Towing thread

Yes all brake lights on the trailer come on when overide is pressed.
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  #279  
Old 09-17-2013, 08:37 PM
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Manual override only activates trailer brakes (not car) you should only be seeing brakelights on the trailer if you are getting car brake lights activating you are getting a back feed through your trigger wire
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  #280  
Old 09-17-2013, 09:25 PM
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Re: The Towing thread

Quote:
Originally Posted by yoda42 View Post
Manual override only activates trailer brakes (not car) you should only be seeing brakelights on the trailer if you are getting car brake lights activating you are getting a back feed through your trigger wire

Yes I know manual override only activates trailer brakes, My problem is that when i press the manual override button I only get the left hand brake light of the Jeep come on, trailer lights and brakes work fine. If I use the brake pedal all lights come on.
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  #281  
Old 09-17-2013, 09:49 PM
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Quote:
Originally Posted by yoda42 View Post
Manual override only activates trailer brakes (not car) you should only be seeing brakelights on the trailer if you are getting car brake lights activating you are getting a back feed through your trigger wire
Actually, both the vehicle and trailer brake lights are supposed to illuminate when using manual override. Its designed that way so that you get all brake lights whether you press the pedal or move the override lever (either way, you're braking after all). I'm on my third car/controller and they've all worked that way. I remember reading in the install instructions about this. My new P3 controller is up at the dealers, so I don't know if it's mentioned in its book.

With regard to a single light working, I suspect that your electric controller brake light output wire has been wired into the harness on same side that is illuminating. CAN only tells the various modules and ECU's what it wants them to do. It doesn't actually make the physical electrical contact (which seems to be happening here). As someone else mentioned, there are probably 2 (or even 3, if the centre brake light is in the circuit) output lines to the brake lights. The wire has probably been tapped downstream of the controller.

I don't know whether the Jeep has bulb-failure reporting capability in the EVIC, but typically that's one reason why some modern day cars have separate circuits for various lights. My last bike had this 'feature', so it could tell me if I had a left or right hand xxxxx bulb failed.
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  #282  
Old 09-17-2013, 09:59 PM
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Re: The Towing thread

That is how I believe it should work, all brake lights should come on regardless of manual override or braking normally.
Can any one confirm if there brake controller is doing the same as mine and if my problem can be fixed and how to fix it.
Cheers Brad.
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  #283  
Old 09-18-2013, 06:08 AM
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Re: The Towing thread

Brad,

All brake lights should illuminate. Your setup has issues. I suggest you take it back to whoever did the install.
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  #284  
Old 09-18-2013, 07:11 AM
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Re: The Towing thread

Quote:
Originally Posted by xdra10 View Post
That is how I believe it should work, all brake lights should come on regardless of manual override or braking normally.
Can any one confirm if there brake controller is doing the same as mine and if my problem can be fixed and how to fix it.
Cheers Brad.
My guess is that the installer took the trigger signal from the back of the closest brake light. The override may be shorting out that brake light or perhaps the CAN senses an impedance imbalance between the brake lights and spits the dummy. It is best to take the trigger from the single brake light wire on the trailer harness.
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  #285  
Old 09-18-2013, 08:19 AM
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Re: The Towing thread

FWIW, I have a Projecta 150A electronic battery isolator trailer kit. I recently ran the trailer battery charge down to 28.5%. The voltage was down to 12.2V. Connected up the Grand and started the engine. The trailer immediately drew 60.4A at 13.4V. Within about 30sec the current dropped to a bit over 50A and the voltage increased. I'm very happy with the performance of the setup and glad I went for the 175A Anderson plug. The popular 50A Anderson would not have coped or at least the circuit breakers would have continually tripped. What I like is that this Projecta unit does not require circuit breakers.
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  #286  
Old 09-19-2013, 07:41 AM
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Re: The Towing thread

Does anybody know what the differance between the MY 2014 and the MY 2013 tow bar wiring is?
Took the Jeep back to the dealer today and they told me they used a modified loom supplied by jeep but it is not the MY2014 loom.
Have rebooked the jeep in on wednesday to get it replaced or fixed hopefully,
He is not saying he is going to replace the loom yet but i am just wondering if i should demand it.
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  #287  
Old 09-19-2013, 08:12 AM
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Quote:
Originally Posted by xdra10 View Post
Does anybody know what the differance between the MY 2014 and the MY 2013 tow bar wiring is?
Took the Jeep back to the dealer today and they told me they used a modified loom supplied by jeep but it is not the MY2014 loom.
Have rebooked the jeep in on wednesday to get it replaced or fixed hopefully,
He is not saying he is going to replace the loom yet but i am just wondering if i should demand it.
The difference is it doesn't plug straight in so they have splice wires and then it screws up the brake lights.

Sorry to be a smart arse. Possibly has something to do with the LED lights???

I would demand the 2014 loom, I did. At least my dealer had the decency to ask me first.

My car has been sitting at the dealer for 4 weeks waiting for the loom and reverse camera. I have refused to take delivery until supplied.

Are you able to post a photo of where the loom was spliced or where I should look before I take delivery of mine. I want to check it first.
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  #288  
Old 09-19-2013, 06:10 PM
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Re: The Towing thread

Will try and take photos over the weekend.
Most of the wires they splice in to are behind the left hand side boot trim and that is not easy to remove as all the floor and spare tyre have to be removed before you can remove the side cover.
One easy check is to remove the right hand tail light and see if they have spliced in to the indicator wiring and that will tell you if it is not a 2014 loom.
Cheers Brad.
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