After trailering back and forth thru Bville salt water our trailer brakes stopped working. Magnets no good.
So we replaced them.
But we had to see where the juice was First. We did that by using a contact light and power to truck plug was
good
Later that day, looking on Amazon. com I came across a 7 pin plug in device with a display that lights up. 6 dots when power is applied. Lights, Right turn left, brake, back up and charge power.
Double checked with device all good. Was able to check every power by myself except brake petal.
I zip tied the brake controller handles together so I could check if the power came on.
Neet little tool for future trouble shooting for about #12 bucks
JL222