Testing Emergency Break-Away Switch
The other day I decided to see if my brakes needed adjusting and to test the emergency break-away switch on our trailer. I didn't have any reason to think it would not operate properly, but I figured knowing it would work would be better than finding out the hard way that it didn't. The trailer was not connected to the tow vehicle. It was plugged in to external power. I lowered the jacks on both sides until each tire could spin freely and pulled the switch pin. I then tried each tire and, to my surprise, they both still spun freely. No clicking, humming, no sound at all. My first thought was that, for some reason, it needed to be unplugged from the external power. No change. Next, I figured the switch or the wiring of said switch was somehow bad. I replaced the switch pin and checked the wires coming out of the switch. One wire showed 12 volts (this one apparently coming from the batteries) the other one was "dead" until the switch pin was pulled and then it too showed 12 volts. That proved that the switch itself was functional. I then found the blue wire inside the trailer that exits to the outside to attach to the brake drum on the street side. This wire tested hot when the switch pin was pulled, so I knew the wiring was good to that point. I then checked it outside the trailer at the drum and that tested hot also. Meanwhile, the wheels still spun.
So, what am I overlooking? Am I incorrect in my expectations? Could it be that the brakes only need adjusting? To the best of my knowledge the brakes have always worked properly thru the tow vehicle.
Any suggestions would be appreciated.
Steve and Tali plus Dogs: Reacher and Lucy
2008 Outlaw Oliver Legacy Elite
2014 Outlaw Oliver Legacy Elite II
2014 GMC Sierra 6.2L Max Tow Pkg 4X4 Crew Cab