Apply voltage directly to it and see what it does. Then measure your voltage output from your plug when you apply the brake.
some years factory brake controllers weren’t compatible.
I’ve got a problem with mine in a Ford 2012 f250. It’s not sending the correct voltage when using the brake pedal. I can use the manual brake lever and it works though
There is an emergency pin? Looks like I need to find a users manual
thanks all, will fiddle with it today
Motorcycle shop. Maybe a place that has riding lawn mowers.Thanks for the info . . . I would normally get this online but I've got to move boats right away with the trailer so hoping to pick one up locally (meaning like tomorrow in Silverdale, Poulsbo area) Auto parts store? Electronics place? Office Depot? I see they are used in network power backups. Time to do some searching . . . trailer plug is fresh due to lighting issues awhile back.