Electric brake question

   / Electric brake question #1  

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I have a new trailer, single 6000 lb axle, short coupled for a specific purpose. When loaded to 3200 lbs payload, I took it on a test drive and was rather surprised at the brakes.

My RV trailer is always about 6.8 -7.2 on the brake controller (weight does not change that much just water and waste water tank level)
My heavy equipment trailer needs about 1.9-2.1 when empty or it locks the brakes and up to as much as 8.6 if I have it at the max load I have ever had on it. Makes sense that as the weight goes up the brake controller setting goes up. The brake controller manual states the same thing.

These trailers are all 2 axle trailers and the new one is a single axle so maybe that makes a difference in my expectations.
I expected that I would want to set the new trailer at around 6 or so since the weight is all on a single axle and on the two axle trailers with 8000 lbs I am at about 6. Good logic or faulty logic I don't know but what I found was that I needed the new trailer to be at 13 to get the braking that I want.

My first thought was the new brakes are not really worn in but the number is so high there has to be something else.
Then I thought I need to readjust the brakes shoes on the axles but the trailer brakes very well slowing the trailer and tow vehicle at 13 perfectly with no assistance from the tow vehicle.
I have no ideas other than adjusting the trailer brake shoe ratchet. I just think the 13 setting which is working fine is way to high considering my other trailer's required controller settings. Could it be the single axle? I have never pulled and never used a single axle trailer before so have no idea if it could be causing the anomaly.

I know there are folks that live and eat trailers and trailer brakes so what's up?
 
   / Electric brake question #2  
I would adjust the shoes and try again.

At the end of the day if they are working that's all you really need but there is something up.

Check the wire size also. I have seen such small wires used on some new stuff it simply can't carry the amps to do the job.

Chris
 
   / Electric brake question
  • Thread Starter
#3  
I would adjust the shoes and try again.

At the end of the day if they are working that's all you really need but there is something up.

Check the wire size also. I have seen such small wires used on some new stuff it simply can't carry the amps to do the job.

Chris

Yes I think brake adjustment is first priority.

Brake wires are 12 gauge. The thing I have not done is check voltage at the brake. Not knowing electric brakes that well but I would suspect that voltage is proportional. Could be amperage but don't know how that would work. If the emergency switch is activated it runs full battery to the brake so pretty certain that it is voltage proportion. Any idea what output is at different controller numbers.
 
   / Electric brake question #4  
Check the ground from the trailer connector to the frame with a ohm meter, it should be zero.

Then check the wires from the brakes to see where and how well they are grounded.
 

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