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Bri mar dump trailer

Old 02-19-2019, 06:22 PM
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Default Bri mar dump trailer

Hey, I bought a 2019 7x14 Bri mar dump trailer, dual axle with electric breaks. I tow it with a 2015 tundra 5.7 For some reason I canít get my new dump trailer to break unless I set it on a high gain 6-10, I could only get the wheels to lock when itís set at 12-14, per Tekonsha manual instruction, going 25mph using the manual break lever.Issue with setting in 6-10 gain is that when Iím applying brake using my truck the gauge is only reading a gain of 2-3, which isnít apply much. I feel the truck working harder. Dealership is saying my 2 year old brake controller is faulty. IDK about that. When dealer test the break he said at a gain of 3-4 he could slightly hear the brakes working, trailer weights 3200lbs, we both know that it should stop easily at a low gain.

I have a new controller on mail that I should get by Thursday, any idea if a new trailer requires adjusting or theyíre self adjusting.
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Old 02-19-2019, 07:01 PM
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Sounds like a connection or ground issue to me.
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Old 02-19-2019, 07:22 PM
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My brake controller is aftermarket but itís plug and play, truck came with 7 pin since I have tow package. Where can I check the ground? Which part of connection?
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Old 02-19-2019, 07:34 PM
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Everywhere there may be one. 7 pin plug on the truck, 7 pin harness on the trailer, and everywhere in between there and then brakes.
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Old 02-19-2019, 07:41 PM
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Ok thank you. I will check this week
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Old 02-20-2019, 05:10 AM
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Did you set the gain on the controller? Reading what you wrote, it sounds like you just used the lever to find out what gain it needed but never adjusted the gain to match. There should be some way to adjust the gain and the ramp speed. Mine has 2 dials on the side for this. That's why you're only seeing 3 or so when you hit the brake pedal - you never adjusted it, just used the level to activate it.
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Old 02-20-2019, 07:05 AM
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I did set the gain, if I dosent than pulling the lever would show no gain. I have use this on my camper thatís around 7-8lbs and at a gain of 4-5 it stops better than my trailer.
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Old 02-20-2019, 07:12 AM
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Ummm no. Pulling the lever will show a level no matter if the gain is set or not. If you pull the lever all the way, it will show max but that doesn't set the gain. Different trailers require different amounts of gain. That's why they give you a way to set the gain. The lever is just there for testing, it does not set the gain. Like I said, mine has 2 dials on the side to set gain and ramp time. I usually have to adjust the gain when I go from one trailer to another... not unusual.

The lever just gives you a way to test without applying the truck brakes.

Disc brakes, many times require more gain than drums - from my experience anyway.
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Old 02-20-2019, 07:22 AM
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Tekonsha prodigy p3, itís a pretty simple controller. I follow the manual instruction on setting gain at 6 than driving at 25mph, u pull the lever to stop, if tires lock up than lower it a bit. My issue is itís not locking at all. It does brake good if I set the setting high but when I brake using my truck the controller is only apply half the gain therefore Iím not getting the full braking power from trailer.

I think its either a faulty controller or the trailer brake isnít functioning correctly
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Old 02-20-2019, 07:36 AM
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Did you set the ramp time too? If the ramp is too low (long), it'll take too long for the gain to "ramp up" when you hit the pedal.
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Old 02-20-2019, 07:39 AM
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Not sure on all model of Tekonsha controllers, but the test slide on mine pushed all the way over only takes it up to the max gain set on the knob. For instance if I am set to 3 on the knob, I can't get 10 out of the slider.
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Old 02-20-2019, 07:57 AM
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Thereís no ramp setting on mine
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Old 02-20-2019, 07:58 AM
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Originally Posted by autobaun70 View Post
Not sure on all model of Tekonsha controllers, but the test slide on mine pushed all the way over only takes it up to the max gain set on the knob. For instance if I am set to 3 on the knob, I can't get 10 out of the slider.
Thats exactly how mine works. Only other thing I could think off is it might need to break in new brakes. It felt a little better yesterday
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Old 02-20-2019, 07:59 AM
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Not sure what brand mine is but apparently not the same brand / model.
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Old 02-20-2019, 08:02 AM
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I pull this off Tekonsha a troubleshoot page


No Auto function (No Braking With Brake Pedal, but OK with the manual lever)
Possible causes:
  • No power on the red wire at the rear of the control, with brake pedal depressed. Check "Stoplight" voltage in the Help / Troubleshooter section of the P3's Menu
  • Vehicle not in motion
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Old 02-20-2019, 08:26 AM
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New axles may need adjustment or, if self adjusting, run them a bit to burn them in and to allow auto adjust. Itís possible one axle is out breaking the other which should equal out over time.
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Old 02-20-2019, 07:31 PM
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You are trusting that the yahoo that hung the brakes and drums on the axles when your trailer was built actually adjusted them correctly. Electric trailer brakes are not particularly tolerant of being loosely adjusted, simply based on how they work. While you have them off to check the adjustment, make sure that they actually put them on the correct sides of the trailer. There is a left and right side backing plate Assy, and I’ve seen them installed on the wrong sides.
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Old 02-21-2019, 05:33 AM
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Originally Posted by Phishdaddy View Post
There’s no ramp setting on mine
Boost Setting?

The boost button was designed to allow a more aggressive setting for your trailer brakes and is available in three levels - B1, B2, B3. Each incremental boost setting increases the sensitivity of the P3’s inertial sensor, enhancing the participation of the trailer brakes during a braking event.Truck/Trailer B1 icons on the screen indicate Boost On.For example:With the boost off, during a braking event, the power to the brakes starts out at zero and increases with deceleration. With the boost on level 1, B1,during a braking event, the power automatically starts out at approximately 13% of the power setting and increases with deceleration. With the boost on level 2,B2,or with the boost on level 3, B3,during a braking event, the power automatically starts out at approximately 25% of the power setting and increases with deceleration

And I agree with above, that the brake shoe clearances would need to be checked/rechecked after brakes are "burned in".

Last edited by chrisjb; 02-21-2019 at 05:38 AM.
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