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Author Topic: Trailer brakes not working  (Read 367 times)

Offline chilipyro

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Trailer brakes not working
« on: June 01, 2017, 06:53:58 PM »
I just had my trailer in for a brake check and wheel bearing repack. They called to tell me that the driver's side brakes were completely worn, but the passenger side brakes had little wear. That seemed pretty mysterious, and they had no suggestions on the cause. They replaced the worn brakes. When I picked it up and drove it home, I decided to test the brakes by activating the manual gain - nothing at all. I didn't try this before I went to the shop, so I don't know if the brakes were functioning before I brought the trailer there. I know they were working last season. As my truck is over built for the trailer, I hardly noticed that the trailer brakes weren't working. But, the manual test showed that they were not. The truck showed the trailer as being attached, and showed the gain increasing when I applied the truck brakes, but nothing on the trailer. I pulled over and removed the brake away emergency brake connector - which should have applied full brakes on the trailer. I put the truck in drive, and it easily pulled the trailer forward in just idle (the tires were not skidding on the pavement).

I took it back to the shop that changed the brakes. They checked and said the wires to the brakes were connected correctly (they did not do a voltage check). They recommended taking it to the dealer.  They could do tires and brake shoes, but were not a full service truck/trailer shop.

Can you guys think of an obvious cause? Also, why would my brakes be wearing so unevenly?


2009 Jayco G2 32BHDS
2012 F350 King Ranch 4x4 Dually Longbed 6.7L Turbo Diesel (5990lbs payload - yeah baby!!),
Reese Dual Cam Hitch, Honda 2000 gens x2
Me, DW, DS (14), DS (12), DD (10), and our two little dogs


Offline Nathan

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Re: Trailer brakes not working
« Reply #1 on: June 02, 2017, 10:39:19 AM »
Are they all adjusted correctly?


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Nathan, DW, DS '03, DD '06 

Offline transamz9

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Re: Trailer brakes not working
« Reply #2 on: June 02, 2017, 11:28:37 AM »
One bad thing about electric brakes is the wiring. Also the magnets get hot and break down and get weak. The best and easiest thing to do when changing or having them changed just buy the complete bolt on backing plate kit.

Also the wire that is used at the factory like anything else they use is bare minimum in size. Over time corrosion sets in and cuts down on how much current can pass through. Check all of your connections especially the grounds. Clean everything that looks suspect. My 2015 is starting to get weak. I have to run my brake controller on 10 when I use to have it on 6.5. I will probably run new and bigger wire this winter to get my power back.



Offline swanny

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Re: Trailer brakes not working
« Reply #3 on: June 02, 2017, 04:44:33 PM »
On the way to Maine a few years ago my brake controller warned me it wasn't connected. Upon further review everything seemed good. So after a few hours of white knuckle driving we got to our CG. II checked everything out I saw as a potential, still say no connected. Than a mobile rv repair guy went by and I flagged him down. Told him my story and he said it was the splices between the truck wiring and the pigtail for the plug. He said take all them apart and redo them. So I did, soldered all connections and sealed with liquid tape. That was about 5 years ago and no issue since. Also I've hear the wires that go through the axle can wear and short out, cut them pull out and replace. Well I quest you could do a continuity test first.

Ps you can use a compass to check each brake magnet when brakes are applied. Hold compass close to rim and it will spin because of the magnetic field.

Kevin
2012 Montana 3625RE   07 Gmc 2500 Dmax / Allison
04 Skeeter Fish and Ski w/ 150hp Yamaha
DW Kathy  Goldens, Kobe (RIP) Yogi & Emma
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