I'm in desperate need of a diagram showing the heater coolant lines for the rear. The lines start at the front of the Van and go all the way to the rear heater core. I have searched the internet high and low and can't seem to find a diagram of the lines themself, maybe I'm just not using the right terms when I search. I have a coolant leak in the front near the bottom hose for the radiator, seems to leak more when I have the rear heater/blower turned on. Any help would be great.