Simple test if you have the tools is to get a air compressort at very low psi put air to the tank and watch for leaks do a pressure test, you can also take a fuel line off from the engine compartment and pressure test it back to the tank that way. Hope that helps.
Heater Core
reroute the line around the power steering cooler
Replace the heater core. It is leaking.
I caulked the gap between the windshield frame and the piece the hood connects.
INTAKE MANIFOLD, AND OR GASKET LEAKING! IT CAN BE EASILY TESTED BY ANY AUTO REPAIR SHOP.
should be a filler tube comin out of the trans
The switch on your battery is faulty which may have been caused by damage from dropping or through a leaking tank but it could just be a problem with cheap manufacturing.
If you are not leaking antifreeze on the floorboard, then it sounds like someone bypassed the heate core. Look under the hood for some hoses that run through the firewall. They may be cut.
The capillaries keep blood from leaking. They clot together quickly and keep as much blood inside the body as possible.
I'm no expert but possibly the cylinderhead is leaking or cracked dropping water into the engine crankcase via the pistons.
Most likely it is the engine oil leaking into the front part of the transmission. There is a seal there -- the rear main seal -- that seals the end of the crankshaft where it exits the engine and connects to the flywheel or flexplate to transmit the engine power to the transmission. Engine oil is black in color, and automatic transmission fluid is largely red in color. Any dirty fluid can appear black or blackened, so it is good to clean all areas where the fluid is leaking, and then use a white paper towel to collect some of the freshly leaking fluid to determine its color.
They're job is to clot together when blood is leaking out of the body to stop the bleeding.