Turns out that the guru's here were right all along. I thank you folks for your help. What was confusing to me was the instructions from BD. I'm installing an exhaust brake and torqloc and their instructions call for tapping into the ECM as well as the PCM. I'm fine with the product and I give BD the highest prop's for customer support, but there's no excuse for an instruct that references something called the 'brake applied switch' and a photograph pointing to something they call a 'cruise control switch'. It wasn't too hard to figure out both were the same, but in my experience in writing technical manuals these kinds of disparate references are a big mistake that only increases the amount of time the customer and tech support are going to have to talk. With something this complex, that could result in a very expensive repair if not done properly, I'm disappointed with instructions that are this confusing. I think this is an area that should be improved.