Author Topic: Breakaway not working  (Read 409 times)

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Offline MadMac66

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Breakaway not working
« on: September 17, 2017, 01:57:29 AM »
As you may, or may not, have read in my other post, I just got done with serving my brakes on our pup.

While I had them accessible I tested the breakaway by spinning the hub then pulling the breakaway pin out. I understand that if the breakaway is functioning properly the wheel should lock. This did not happen.

I understand that the breakaway works on 12v from the camper battery. I checked and everything was hooked up properly. It is also my understanding that if the camper is plugged into shore power (or an extension cord to the home in this case) the camper battery is effectively charging.

Please feel free to correct any of my assumptions above if they are mistaken.

So the new battery is or should be fully charged and is properly plugged in, and the breakaway is wired correctly. So what is not working here?

How can I check whether the power is getting from the battery to the brakes?

Is there a make or model that is preferable to replace the breakaway?

Is there some to test the integrity of the magnet in the brake drum?

Any info on the part required to replace the magnet in the brake drum if it is faulty?

Apologies for a 101 questions, but this is obviously no trivial matter and we are heading out on a 6 hour each way trip in a couple of weekends so I need to get fixed.

Cheers
Adam

Offline CampingPhil

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Re: Breakaway not working
« Reply #1 on: September 17, 2017, 01:23:40 PM »
Breakway devices are direct wired to the battery so they will have their own fuse block inline. The box will usually only have one wire as the attachment to the frame connects the ground. Follow the wire out of the breakway to the battery and check to see if there is an inline fuse.
 
If you are assuming you brakes work (try running a temp wire from the battery and touch the blue battery wire and see if they engage to rule that out first.
 
At the end of the day, Breakaway kits are only $20

https://www.etrailer.com/Accessories-and-Parts/Fastway/FA80-00-2040.html?feed=npn&gclid=CjwKCAjwuvjNBRBPEiwApYq0znMMm16ZQ2C84JHk0oP6xUrkE_4YxE6xSXUk-Dtu6UYbANhFHVptlhoCxx8QAvD_BwE


:martini:Phil and Pete
The happiest people don't have the best of everything, they just make the best of everything that they have!

Offline MadMac66

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Re: Breakaway not working
« Reply #2 on: September 17, 2017, 02:02:30 PM »
Great info, thanks Phil. I'll try the troubleshooting tips you suggest, but I think I may as well just buy a new switch kit and be done with it. At least that will rule the switch out of the equation.

Thanks
Adam

Offline MadMac66

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Re: Breakaway not working
« Reply #3 on: October 01, 2017, 06:15:16 PM »
So Iím back onto this project. I bought and installed a new breakaway switch just out of routine maintenance principle, and as they are so cheap. Put  in a new circuit breaker too as the old one was rusty and janky.

In order to bypass the breakaway to test the brakes Iím confused as to which one of the wires at the wheel is the live wire. One wire goes into the frame at the battery, and two wires exit the frame at the wheel (see photos).

If I want to use a temp wire to test the brakes how would I go about that. All the wiring at the battery is sealed with heat shrink so I can tap into it there

Thanks
Adam

Offline chiefbowes

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Re: Breakaway not working
« Reply #4 on: October 02, 2017, 07:25:44 AM »
Just pull the breakaway and it will power up the brakes. You can put it back in later when your done or pull the fuse while your not working on it.

Offline MadMac66

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Re: Breakaway not working
« Reply #5 on: October 02, 2017, 07:17:26 PM »
Yeah I ended up doing this. Was over thinking and making it more difficult than needed to be. Was trying to isolate each component in the system to check how well itís working.

Anyhow, numpty that I am, I wanted to isolate the magnet in the drum as I was suspicious of how worn it looked. I found this article on etrailer that I followed for troubleshooting.

https://www.etrailer.com/faq-testing-trailer-brake-magnets-for-proper-function.aspx

Long and short of it is I spent best part of an hour cutting into the ebrake wires and testing with my multimeter only to realize that the odd readings I was getting were not related to the magnet, but in fact due to the meter being borked.

Brakes seem to work okay when breakaway is pulled, not great, but okay. And the braking seems to be progressive so it grabs more as it rolls. So I guess weíre good for now.

Next, to test the brake controller I just installed...

Cheers
Adam

 

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