Testing trailer brake controller....

Gene&Ginny wrote:

cannesdo wrote:
...
See this....Not so funny:

https://www.quora.com/How-does-the-compass-on-the-iPhone-work
https://www.quora.com/How-does-the-compass-on-the-iPhone-work

.

You are correct, not funny.

My thinking is that the Hall effect sensor in the iPhone would not respond to an electrically generated magnetic field the same way a simple compas needle would ..... but I may be wrong. I would like to know if someone has tried it.

Keep in mind that most brake controllers will not put out voltage to the brakes if the vehicle not moving. They WILL put out voltage by moving the manual slider.

Thanks...My neighbor came home and I asked her to move the slider when the truck was hooked up and the key was on, while I was back by the wheels and there's no sign of life at all. I think the controller may be dead but it seems strange that the controller light is still on and changing from green to red. Maybe just one component is fried. Could just a dead magnet short the whole system out? Or one bad connection back at the wheels somewhere?

I have a guy coming on Friday, a mobile tech. I'm too fried to try anymore. In the last four days I pulled out four rusted shocks while lying in what felt like a gravel coffin, pulled off a tire...dragged brake drums to Camping World....I'm toast. Electrical work just seems so simple if you know what you're doing and can get all the right info and I feel like I'm one step away from breaking through all the time. And I don't like paying people to do things I could do myself and I enjoy the learning...I'm just exhausted. Even I have my limits. Getting gang-snarked by my fellow RVers was the icing on the cake. This forum never disappoints.

Appreciate your kind reply.