Electronic Trailer Brake controller wire of the 7 pin connector
Thread Starter
Member
Joined: Jun 2014
Posts: 92
Likes: 6
2014 GL450
Electronic Trailer Brake controller wire of the 7 pin connector
Hi,
I have a question regarding the 7 pin connector trailer electric brake pin receiving signals/12v instead of sending signals to trailer.
In the 7 pin connector next to the hitch, among the 7 pins, one of the pin is used for trailer electronic brake. Brake controller sends signal/power to that pin to activate the trailer's electronic brakes.
Now I have a bit of special towing situation, i.e. I need to flat tow another vehicle, instead of a trailer, just like the big motorhomes flat-tow a regular car behind them.
In this kind of towing, when the car being towed behind has its brakes activated, it will send a signal/12v back to the vehicle towing it via the trailer electric brake pin in the 7 pin connector. For motorhome flat-tow a regular car situations, this is to let the driver know that the towed vehicle is being properly braked.
My question is:
When I DON'T have brake controller installed in my GL450, and when the trailer electric brake pin receives signals/12V from the vehicle towed behind it, will this 12V being feed back to GL450's 12v system in any way (Really do not want that to happen). Or, because I DO NOT have a brake controller installed in my GL450, that pin is actually not connected to GL450's 12V system at all?
Thank you very much!
I have a question regarding the 7 pin connector trailer electric brake pin receiving signals/12v instead of sending signals to trailer.
In the 7 pin connector next to the hitch, among the 7 pins, one of the pin is used for trailer electronic brake. Brake controller sends signal/power to that pin to activate the trailer's electronic brakes.
Now I have a bit of special towing situation, i.e. I need to flat tow another vehicle, instead of a trailer, just like the big motorhomes flat-tow a regular car behind them.
In this kind of towing, when the car being towed behind has its brakes activated, it will send a signal/12v back to the vehicle towing it via the trailer electric brake pin in the 7 pin connector. For motorhome flat-tow a regular car situations, this is to let the driver know that the towed vehicle is being properly braked.
My question is:
When I DON'T have brake controller installed in my GL450, and when the trailer electric brake pin receives signals/12V from the vehicle towed behind it, will this 12V being feed back to GL450's 12v system in any way (Really do not want that to happen). Or, because I DO NOT have a brake controller installed in my GL450, that pin is actually not connected to GL450's 12V system at all?
Thank you very much!
Thread Starter
Member
Joined: Jun 2014
Posts: 92
Likes: 6
2014 GL450
That was what I was hoping for! And yesterday I used multimeter to test the pins and it also indicates that that pin is "detached" when there is no brake controller.
Thank you very much for your help!
Thank you very much for your help!
