Electric Brakes on Camper - uneven brake effort

Submitted: Wednesday, Jan 27, 2010 at 00:30
ThreadID: 75525 Views:6453 Replies:7 FollowUps:0
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Hi all
Is there any way to fix uneven braking from the electric brakes on my camper? One wheel seems to brake harder than the other and sometimes locks up on loose surfaces under hard braking. I can turn down brake effort but what I want is even braking. From what I can see on the net, electric brake units cannot vary the braking effort on one side or the other – is that right? What to do?
Any advice appreciated.
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Reply By: Member - Ed C (QLD) - Wednesday, Jan 27, 2010 at 01:23

Wednesday, Jan 27, 2010 at 01:23
Sounds like the brake shoes need adjusting..

(assuming they are drum brakes) Hopefully this will help >>>

adjusting trailer drum brakes

As you can see, the above refers to the 'Dexter' brand..
The procedure(s) for Alko would be identical..


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AnswerID: 401246

Reply By: V8 Troopie - Wednesday, Jan 27, 2010 at 01:26

Wednesday, Jan 27, 2010 at 01:26
The braking effort is directly related to the current passing through the magnetic coil. So, if there is a bad connection at one wheel you would get less braking on that side.

Go through the brake wiring (on the trailer) with a fine tooth comb. The easiest way would be with a DC clamp on Ampmeter, checking each brake coil and see where the difference is while somebody pushes the brake pedal.

If that checks OK then you have a mechanical problem.
AnswerID: 401247

Reply By: PradOz - Wednesday, Jan 27, 2010 at 08:22

Wednesday, Jan 27, 2010 at 08:22
i had same problem with mine until i took it in to a caravan repairer here in sydney and he adjusted them on both sides until it was all working correctly.

Just check that you drive around block and try lock up brakes to see if its even after you/they adjust them.

could try google as i have found a site before that explains it really well if you are handy. i prefer to leave that stuff to the experts though. if i find the site i will let you know....
AnswerID: 401259

Reply By: Member - Nick (TAS) - Wednesday, Jan 27, 2010 at 09:04

Wednesday, Jan 27, 2010 at 09:04
Had the same thing happening on our camper after installing electric brakes, finally I think I have it sorted.
In the end the side that that was locking up easily I had to back the adjuster right of(alot looser than normally adjusted) and the side that wasnt real strong, I adjusted tighter(Not to tight though), took it for a drive, got brakes hot and both locked up.
It has new off road magnets and I fitted new earths to both vehicle and trailer but these made no differance so it looks like it was just adjustment.
AnswerID: 401260

Reply By: ozjohn0 - Wednesday, Jan 27, 2010 at 10:16

Wednesday, Jan 27, 2010 at 10:16
It's usually caused by one of two problems.
Improper brake adjustment as previously mentioned, or poor wiring.
Wiring problems are quite common with some brands of trailers in that the brake wire from the tow vehicle goes to one wheel first and then has another length of wire to the other wheel. This results in a lower voltage to the second wheel. The wires to each wheel should be the same length.
Most trailer manufacturers run the wire down the centre of the trailer then spit to each wheel which results in the wires being the same length and therefore delivering the same voltage.
AnswerID: 401275

Reply By: kiwicol1 - Wednesday, Jan 27, 2010 at 13:46

Wednesday, Jan 27, 2010 at 13:46
The magnets also can flog out where they are attached on the back of them. Replacing them is the only option. Col
AnswerID: 401299

Reply By: jdwynn (Adelaide) - Wednesday, Jan 27, 2010 at 21:34

Wednesday, Jan 27, 2010 at 21:34
Thanks everyone, you've given me lots of good info. Hopefully I can sort it now. Cheers
AnswerID: 401385

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