Hi, I have a major problem with my electric brake... they don't brake at all. First I want to understand something. Yesterday I went out to check the voltage on my car plug to make sure everything is ok with the plug. Result I got 8.39v (blue wire) while pressing brake pedal. Is this normal or should I get 12v. My understanding is that the voltage should varie according to my brake controller settings... am I right? Next step is to check the wiring on the pop itself and the fuses. Thank you guys!