Jethro4640

Good Evening, I have a 2014 ML350 with factory tow package. I've found the brake controller connector under the brake itself. In attempt to install Tekonsha 90195 P3, I've found out that there is 0 volts going to the connector. I've checked this with the multimeter with Brown being the ground and gone across the other 3 wires to include the Red/Blue that should be alway hot.
What am I missing??

Thanks,
Bryan

nsully

Unsolicited response, and not an answer to your question but I have the same vehicle, ran into the same problem, sent the P3 back and went to the RF - works like a dream and no wires or mounting. Just my .02