Tripped breaker, on a very poorly installed system.

All right I got one smaller unit right here. Looks like it was the original unit and then I've got another return right beside that one. T-wide into this and of course I got another return over there and needless to say I would not have done it this way. But the duct work is not why I'm here. I'm here because we got a blank thermostat. Let's see if we got power. I got no power. Let's do a quick check for shorts at least a direct short nothing okay this breaker was tripped i'm fixing to open this up and check that breaker you can see that it does not look burnt down there so next is to check below that one turned a good bit it was loose right at start look at that you see how loose that is by the way we have to do some digging and get back there to that of how this one was installed upstairs look at this yeah that's that's different