09 no crank

[big_roy]

I've got an 09 Prostar with an ISX and a 10sp eaton ultra shift. Sometime when I turn the key to start the truck all I get is some relays clicking in the fuse box. When it does that I can step on the brake pedal and the engine will crank right up. The only two things I can think of is a bad starter relay or my body controller is start to take a dump. I say that about the body controller because every once in a while over the weekend I'll see my sleeper light come on by itself. Anybody have some other suggestions on what else to check out?