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Open Roads Forum  >  Travel Trailers  >  General Q&A

 > Travel Trailer Brake Problem

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rirish1

Alachua, Florida

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Posted: 06/03/21 06:58am Link  |  Quote  |  Print  |  Notify Moderator

I have an intermittent problem with my TT brakes. I have a 2017 Chevy 2500 with the internal brake module. I recently drove 1000 miles without problem when the truck started alarming with the following message:
Check Trailer Connection. It then almost immediately notifies me that the trailer is connected. It is accompanied by an alarm bell and it sometimes happens 3-5 times a minute. The 7 pin plug is in good shape and I can't duplicate the problem. Other than rewiring the entire brake system does anyone have any suggestions? Can a brake magnet go bad intermittently? This didn't start until one of the bolts holding the brake plate on came loose and rattled around in one wheel for hundreds of miles. The TT is a 2008 KZ and it seems unlikely that there is a wiring problem.

Lynnmor

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Posted: 06/03/21 07:20am Link  |  Quote  |  Print  |  Notify Moderator

Very likely that you do have a wiring problem and it may be in the truck connector, the trailer plug, trailer wiring and maybe that repaired brake. My bet is that you will find it at or near the trailer plug.

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bgum

South Louisiana

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Posted: 06/03/21 07:35am Link  |  Quote  |  Print  |  Notify Moderator

Sounds like a short. It may well be right at the magnet area caused by the loose brake plate.

BobsYourUncle

Calgary Alberta Canada

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Posted: 06/03/21 07:45am Link  |  Quote  |  Print  |  Notify Moderator

Sometimes the 7 pin gets a little bit slightly corroded or the surface of the pins make less than optimal contact. Mine does that once in a while.

When I connect, I am in the habit of running the plug in and out a couple times, wiggling, slightly rotating it when I plug it in. I find that helps ensure a good connection.

On the trailer connector, I sometimes take a tiny file or similar and rough up the contacts a bit to make sure it has a clean surface in there. Have a look in the truck connector and make sure the pins are clean too. Gotta be careful if you rough them up a bit, don't short out anything hot.


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kellem

Shenandoah valley,VA

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Posted: 06/03/21 07:52am Link  |  Quote  |  Print  |  Notify Moderator

Start simple and apply some dielectric grease to the 7-pin connection.

Fisherman

Angus, Ontario, Canada

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Posted: 06/03/21 07:54am Link  |  Quote  |  Print  |  Notify Moderator

kellem wrote:

Start simple and apply some dielectric grease to the 7-pin connection.


Why people do this is beyond comprehension.

Dielectric grease, or tune-up grease, is a silicone-based grease that repels moisture and protects electrical connections against corrosion. ... The grease does not conduct electricity, so it shouldn't be applied directly to the mating surfaces (pins and sockets) of an electrical connection

SpeakEasy

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Posted: 06/03/21 07:58am Link  |  Quote  |  Print  |  Notify Moderator

Yes, that wheel with the loose bolt is suspect. That's the first place I'd be looking for a short. Get your multi-meter out and happy hunting!

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Gdetrailer

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Posted: 06/03/21 09:25am Link  |  Quote  |  Print  |  Notify Moderator

Loose wheel bolt?

Lucky you didn't tear up the brake shoes and lockup the brakes..

But, yes, a nut or bolt flying around inside of a contained area could have chaffed the brake magnet wire and is causing an intermittent short.

Another suspect place is most manufacturers run the brake wiring inside the axle tubes.. The wire is laying loose inside the tube and can easily rub the insulation causing an intermittent short..

Some issue with the axle tube can also break the wires inside the tube causing no connection to the other brake.

Manufacturers also do not use weather proof connectors and the wires tend to corrode inside the crimps making for poor or intermittent connections.

Check the wheel where you found the bolt loose, make sure the magnet wire is not damaged.

Check and verify all of the connections at the crimp connectors.

Barring all that, you have a 2008 trailer, running all new wiring is not a bad idea and you can upgrade the wire size a couple of wire gauges, use better weather proof wire connectors and get better braking at the same time.

rirish1

Alachua, Florida

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Posted: 06/03/21 09:30am Link  |  Quote  |  Print  |  Notify Moderator

It is a 2018 TT so I am hesitant about rewiring the whole thing. I will explore the whole system again. I can never reduplicate it without driving hundreds of miles. I appreciate all the suggestions. I thought about replacing the magnet in the suspected wheel first.

Gdetrailer

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Posted: 06/03/21 11:11am Link  |  Quote  |  Print  |  Notify Moderator

rirish1 wrote:

It is a 2018 TT so I am hesitant about rewiring the whole thing. I will explore the whole system again. I can never reduplicate it without driving hundreds of miles. I appreciate all the suggestions. I thought about replacing the magnet in the suspected wheel first.


OK, might wish to edit your original post as you did mention 2008..

rirish1 wrote:

snip.. The TT is a 2008 KZ and it seems unlikely that there is a wiring problem.


Unless the magnet shows physical damage I would just look at the wire to make sure no insulation has been shredded.

If you find any damaged insulation you can simply either cover the bare insulation with black tape or cut and splice with crimp or solder and then cover with black tape or if you have heat shrink tubing. Then make sure the wire routing will not cause any further problems.

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