Yeah I pulled every connector, trailer brake module, tail lights, under the dash the break pressure sensor, I've lost track of everything, new battery today. Still no idea. Plan B for the win. Fingers crossed.
I do, however I think I'm going to need a digital multimeter. I had a chance to jump on the computer for a while and it looks like that's what it'll take. It's starting fine as long as I disconnect the battery. Just hope it keeps it up on the road tomorrow.
