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 > Found a new way to test brake wiring and magnets

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joshuajim

Mojave Desert

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Posted: 08/31/19 08:27am Link  |  Quote  |  Print  |  Notify Moderator

A rat chewed off one of my brake wires. I repaired it and wondered if any other places were chewed. After pondering it for a while, I turned off the converter, unplugged the breakaway switch and hallelujah the Tri Metric indicated 12 amps of draw.

Now this will not test the plug or guarantee that some other wire had some teeth marks, but it is a quick and easy way to check.


RVing since 1995.

joebedford

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Posted: 08/31/19 10:25am Link  |  Quote  |  Print  |  Notify Moderator

I've done the same myself but I never got to 12A.

DFord

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Posted: 08/31/19 10:35am Link  |  Quote  |  Print  |  Notify Moderator

3 amps per brake is normal maximum draw for electric brakes. At 12 amps, I'm figuring you've got 4 brakes.


Don Ford
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BlueOx Aventa II Towbar - ReadyBrake Inertia Brake System


Matt_Colie

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Posted: 08/31/19 11:32am Link  |  Quote  |  Print  |  Notify Moderator

I used to get out a compass and have DW hit the brake peddle. When I held the compass near the brake, the needle would swing. If it didn't, I knew I had found a bad brake.

I do hope you found all the chewed wires. I hate that.

Matt


Matt & Mary Colie
A sailor, his bride and their black dogs going to see some dry places that have Geocaches in a coach made the year we married.


MEXICOWANDERER

las peƱas, michoacan, mexico

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Posted: 08/31/19 12:06pm Link  |  Quote  |  Print  |  Notify Moderator

*** The compass tickled me. Great abstract analysis !!!

joshuajim

Mojave Desert

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Posted: 08/31/19 12:39pm Link  |  Quote  |  Print  |  Notify Moderator

joebedford wrote:

I've done the same myself but I never got to 12A.


The bath fan and some other parasite loads were still on. But close enough for me.

RCMAN46

NorthWest

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Posted: 08/31/19 01:20pm Link  |  Quote  |  Print  |  Notify Moderator

That is what I love about my Prodigy P3. It has a diagnostic function that I use every morning before I start a trip.

With four brakes I have found it is 1 amp per volt applied. My max setting when I use the manual lever is 7.5 volts thus I should read about 7.5 amps with full lever travel for my setting.

rjsurfer

North Carolina

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Posted: 08/31/19 01:52pm Link  |  Quote  |  Print  |  Notify Moderator

RCMAN46 wrote:

That is what I love about my Prodigy P3. It has a diagnostic function that I use every morning before I start a trip.

With four brakes I have found it is 1 amp per volt applied. My max setting when I use the manual lever is 7.5 volts thus I should read about 7.5 amps with full lever travel for my setting.



How do you initiate this test, or is done automatically on power up?

Ron W.

* This post was edited 08/31/19 02:01pm by rjsurfer *


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RCMAN46

NorthWest

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Posted: 08/31/19 05:26pm Link  |  Quote  |  Print  |  Notify Moderator

This is how to get current reading from a P3 controller.

[image]

Matt_Colie

Southeast Michigan

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Posted: 08/31/19 06:01pm Link  |  Quote  |  Print  |  Notify Moderator

My coach is way too old for that.
The brake control Kelsey Hayes and is Teed into the rear brakes and is activated by the brake pressure. I like it because it actually tracks the applied brake pressure.

Maybe I will look for something newer when the flints where out.
-OOPs wrong technology.

Matt

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