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Old 01-02-2016, 01:31 PM   #11
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At speeds below 30, yes.

Because of pulse width modulation, a standard multimeter will read somewhere around 7v-7.4v, but in reality if you scope the output you will see 12v output but only 70% of the time, vs roughly 98% of earlier model years.

According to Ram output above 30mph is normal. The member that has been doing all the testing with his scope will not be able to check this until spring now.

He currently uses a P3 despite having an ITBM.
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Old 01-02-2016, 01:33 PM   #12
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Old 01-02-2016, 01:35 PM   #13
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Stick with P3. I have to use 7-7.5 gain around town and cannot lock up the trailer brakes at all when attempting to set the trailer brakes per Ram Owners manual.

For comparison, when we towed my trailer with my dad's 2012 Ram we set the ITBM at 4.5 gain.
I was just at the RV stealership for that reason (brakes not locking to find optimal gain). They wanted to charge me $50, since they "had to hook it up to the simulator" which showed no problem with trailer brakes. That left my TV, a 2015 Ram. They tried telling me my 7K trailer (wet) was too heavy to lock up but they had an adapter I could purchase to create more resistance which would cause the integrated brake controller to put out more power. I asked 2 questions. If my trailer at 7K wet was too heavy to lock up, how do semi trailers lock up their brakes since they are tens of thousands of pounds and 5 months ago on my Lincoln that I paid them to install the Prodigy brake controller on (CW's idea, under warranty she said) I couldn't lock them up either, per the Prodigy instructions. They dropped the fees and said it is unsafe to lock up the brakes on your trailer on the highway. Keeping the report so if I do get in an accident and they determine its faulty trailer brakes, I have proof I addressed the issue.
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Old 01-02-2016, 02:51 PM   #14
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Semi's use air brakes.
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Old 01-02-2016, 03:07 PM   #15
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I'm familiar with the above discussion, having experienced lack of braking at low speed. I read where a RAM engineer suggested to change the setting to "heavy electric over hydraulic". I made that change and set the gain to 6 or 7, now no problem, works well. RV is 16,300 lb CC, ck 38.
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Old 01-02-2016, 03:39 PM   #16
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I'm familiar with the above discussion, having experienced lack of braking at low speed. I read where a RAM engineer suggested to change the setting to "heavy electric over hydraulic". I made that change and set the gain to 6 or 7, now no problem, works well. RV is 16,300 lb CC, ck 38.

I heard that suggestion as well.
Makes sense.

I wonder.. During the initial testing, what setting was being used on the trucks?


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Old 01-02-2016, 03:41 PM   #17
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Heavy electric gives a stronger initial application. Same full power.

As a side note when I tested voltage with my Meter I had MORE voltage on light electric at gain 10 and 100% slider. Over a full Volt more.
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Old 01-02-2016, 04:11 PM   #18
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Would changing to the 2014 controller help? The Ram part number for the '14 is 82213474. Compare that to the '15 controller part number. I'm sure the wiring will be the same and you could hook up and test before swapping the units. They're easy to access but hard to remove.
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Old 01-02-2016, 04:40 PM   #19
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I doubt it. I have a '13 with this anomaly.
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Old 01-02-2016, 06:38 PM   #20
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Attachment 97151

I do not have the factory controller.
I have a P3.
There's one, complicated reason, I would like to install the factory controller.
But, not if its not working well.


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The new ram 3500's don't come std with brake controllers???
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