Keep in mind when this switch has been pulled out of its holder the brake magnets on the trailer are being applied 12VDC from your trailer battery. Each electric brake will pull around 3AMPS DC current when 12V is applied. A single axle will draw around 6AMPS DC Current. A double axle setup will pull around 12AMPS DC current.
This should not be left ON for a too long of period in this mode as it may run down your 12VDC battery pretty quick and may do damage to the electric brake modules.
The breakaway switch purpose is too immediately apply full trailer electric brakes in the event your trailer becomes disconnected from the tow vehicle while being towed.
This switch is a DOT requirement and therefore must be in working functional order when going down the public highways...
In other words when your trailer is being towed on public highways you must have the emergency break-away cable hooked to the tow vehicle and you also must have a working 12VDC battery on-board the trailer and functional brakes to meet DOT requirements.
Roy and Carolyn
I claim Horse Creek Country in Southern Ill - Momabear is from North Texas
We live in King George VA
RETIRED DOD DOAF DON CONTRACTOR Electronics Tech 42YRS
"We're burning daylight" - John Wayne
2008 STARCRAFT 14RT OFF-ROAD POPUP with PD9260C and three 85AH 12VDC batteries
2010 F150 FX4 5.4 GAS with 3.73 gears - Super Cab - Towing Package - 2KW Honda EU2000i Gen
K9PHT (since 1957) 146.52Mhz
"We always have a PLAN B"