"NokNokMan" wrote in message
...
Hi all,
I'm just about finished building my utility coal-hauler trailer. (Metal
content? about 300lbs. angle-iron and half an 8" spool MIG wire). Since
this trailer has a GVW of 3500Lbs., brakes are required. I had trouble
determining if a breakaway kit was needed, but all signs pointed to "yes".
So if the hitch somehow falls off and the safety chains fail and I hit
lotto and get struck by lightning, then the breakaway battery will
supposedly energize the actuating magnets in the brakes. My question is
this: if I were to attach everything to my 7-connector wiring connector
on the back of the truck (one wire is for the electric brakes which are
connected to a dash-mounted brake controller) would I fry said controller
if I should happen to yank the lanyard out of the breakaway switch?
Assuming that happened, the twelve volts from the breakaway battery would
energize not only the brakes, but the 12v out from the brake controller
itself. I know the manual says "don't wire this thing up wrong or you'll
ruin it". I'm wondering if a diode between the controller and the
breakaway unit would stop the current from flowing to the controller. If
so, what kind? I have no clue about this sort of thing. Would the diode
affect the operation of the controller? Any help would be much
appreciated.

TIA,
Nok

Nok

Very, Very, Very unlikely that the breakaway battery voltage would damage
your brake controller.

Carl