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[2004fx4]

I have a question for all you guys with a brake controller. First a little back ground. I have had a Tekonsha Sentinal brake controller for about 4 years now. I used to have a regular time brake controller that I hated. In the Sentinal's manual it stated to set the intensity of the brakes by pulling the manual slide and turning up the intensity until the brakes locked up. Then all you do is back it off a bit. I can not do this with this controller. At maximum it still does not lock up the brakes. I just thought it was the trailer, even though I could lock them up with the other one.

Well now it has been bothering me since I saw the new Techonsha P3. I went to a RV store and they told me I should make sure my controller was working right.

Here is my question. When I check at the controller I have a voltage of 13.5 going to it. When the brakes are applied I have a maximum voltage of 11.5 comming out of it. Is this normal? Or should it be the same as voltage in. I also checked the voltage at the trailer plug on the truck, it is 11.5 also. I know that it is only 2 volts. But if my calculations are right that would mean a 15% drop in possible braking.

Could someone please confirm this on their brake contoller?

Thanks