Applying Trailer 12V to Trailer Brakes
I use an electric trailer dolly to precision position our TT after pulling it onto our paved parking pad. (We have very limited manuvering room) The dolly has a 7 pin connector cable and a brake contr...
Forum Discussion
Old-Biscuit wrote:
No problem
If you look at end of trailer umbilical cord plug with raised part UP
11 o'clock is 12V HOT
7 o'clock is brake controller output
Make up a momentary spring loaded toggle switch with flat terminals and push them into corresponding pin positions
Then toggle on/off for braking as needed.
When On you will have FULL trailer battery voltage so limit amount of on time.
Otherwise brake magnets could be damaged
So I sometimes have the brake on for about a minute or so since our pad has some slope. How long can you leave 12V applied before causing damage? I can put a small (0.1 - 0.2 Ohm) power resistor in series to limit current.
