RV.Net Open Roads Forum: Tech Issues: Amps/voltage to trailer brakes

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > Amps/voltage to trailer brakes

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next
Sponsored By:
ivbinconned

highway 16

Senior Member

Joined: 09/27/2003

View Profile



Posted: 10/16/21 11:26am Link  |  Quote  |  Print  |  Notify Moderator

We have several fifth wheel trailers. Brakes work very well on all but the 12000 lb. Cedar Creek.
I have manually adjusted them. Cleaned them. There is current to each and there is breaking to each wheel.
But at the highest setting it feels far from adequate.
Is it a possibility that the trailer brake wire is to light a gauge to deliver the proper level of current?
Or is the weight of the trailer so much more than the other trailers it just feels poor.

On the other trailers the brakes will cause the tires to stand if pulled full. But the RV certainly will not.


Ram and 34 ft Cedar Creek

Gdetrailer

PA

Senior Member

Joined: 01/05/2007

View Profile



Posted: 10/16/21 11:42am Link  |  Quote  |  Print  |  Notify Moderator

ivbinconned wrote:

We have several fifth wheel trailers. Brakes work very well on all but the 12000 lb. Cedar Creek.
I have manually adjusted them. Cleaned them. There is current to each and there is breaking to each wheel.
But at the highest setting it feels far from adequate.
Is it a possibility that the trailer brake wire is to light a gauge to deliver the proper level of current?
Or is the weight of the trailer so much more than the other trailers it just feels poor.

On the other trailers the brakes will cause the tires to stand if pulled full. But the RV certainly will not.


Yes, it is possible the wiring is not of sufficient wire ga and a lot of braking power is being lost through the wire resistance.

12K lbs is certainly a lot of weight but it is do able with standard drum brakes.

I have a 10K lb GVWR open flatbed Utility trailer and I have had loads well above 10K lbs on that trailer and yet the stock drum brakes still have no issue with slowing the entire trailer and truck combo down.. Granted, my flatbed is much shorter at 18ft and the manufacturer used 12 ga wire on it.. Length and wire ga can make a difference.

Try a emergency breakaway test, pull the break away pin then pull forward. The trailer brakes should lock the wheels from turning.

If only minor braking effort is noticed, then checking the trailer wiring is your next item to check/replace.

If wheels do lock, the wiring is good enough for the breakaway but may be still a bit light for the brake controller.

Also do be aware, if you are using an integrated brake control, they are typically programmed to deliver less braking effort at low speeds. Some of the newer IBCs have multiple preset effort braking levels (low/med/high) which allows you to adjust the aggressiveness of the controller.

BB_TX

McKinney, Texas

Senior Member

Joined: 04/04/2005

View Profile


Offline
Posted: 10/16/21 02:47pm Link  |  Quote  |  Print  |  Notify Moderator

Have you pulled the wheels and inspected the brakes?

Gdetrailer

PA

Senior Member

Joined: 01/05/2007

View Profile



Posted: 10/16/21 03:05pm Link  |  Quote  |  Print  |  Notify Moderator

BB_TX wrote:

Have you pulled the wheels and inspected the brakes?


Good question.

I forget that a lot of folks "adjust" their brakes through the tiny hole on the backing plate [emoticon]

I never use that hole but a lot of people including mechanics do. I had a inspection mechanic back one of mine off doing that [emoticon]

Very easy to accidentally loosen the brakes doing it that way since most axle drum brakes are not self adjusting so there is no lever that stops you from turning the star wheel backwards..

fj12ryder

Platte City, MO

Senior Member

Joined: 08/19/2003

View Profile



Posted: 10/16/21 04:16pm Link  |  Quote  |  Print  |  Notify Moderator

Just curious how a person would adjust a manually adjustable drum brake unless they used the "tiny hole on the backing plate"?


Howard and Peggy

"Don't Panic"

MFL

Midwest

Senior Member

Joined: 11/28/2012

View Profile



Good Sam RV Club Member

Offline
Posted: 10/16/21 04:44pm Link  |  Quote  |  Print  |  Notify Moderator

I'm curious, and I know there will be an answer!

Jerry





ivbinconned

highway 16

Senior Member

Joined: 09/27/2003

View Profile



Posted: 10/16/21 05:51pm Link  |  Quote  |  Print  |  Notify Moderator

In original post I mentioned I “clean” the brakes.
I think I know what I’m doing.
Packed hundreds of wheel bearings over the years and have installed many a brake set.

Our truck is an 16 Ram. Has the “integrated” controller.
And yes to “clean” them...they get inspected.

Lynnmor

Red Lion

Senior Member

Joined: 07/16/2011

View Profile



Good Sam RV Club Member


Posted: 10/16/21 06:24pm Link  |  Quote  |  Print  |  Notify Moderator

It is very likely that the wiring is too small. Here is information on testing the brakes.





MT BOB

Montana

Full Member

Joined: 03/02/2021

View Profile


Offline
Posted: 10/16/21 06:42pm Link  |  Quote  |  Print  |  Notify Moderator

Lynnmor wrote:

It is very likely that the wiring is too small. Here is information on testing the brakes.


I'm with you,especially from this RV manufacturer. Too small from the brakes to the trailer plug in.
But, owner should make sure he got the brakes he paid for, number of and size.

jkwilson

Indiana

Senior Member

Joined: 06/14/2010

View Profile


Offline
Posted: 10/16/21 07:02pm Link  |  Quote  |  Print  |  Notify Moderator

fj12ryder wrote:

Just curious how a person would adjust a manually adjustable drum brake unless they used the "tiny hole on the backing plate"?


Me too.


John & Kathy
2014 Grand Design Reflection 303RLS
2014 F250 SBCC 6.2L 3.73

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next

Open Roads Forum  >  Tech Issues

 > Amps/voltage to trailer brakes
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2021 CWI, Inc. © 2021 Good Sam Enterprises, LLC. All Rights Reserved.