ALright hooked up, still nothing.. this sucks.

Replacing the transformer should be straight forward I Would assume? Just unhook the cables, place transformer and hook up the cables back the way they were before to the old one right?

Alright I Checked the Voltage on both Wires and there is none, can I do this before i twist the wires together that I cut too?

And if I get no voltage what is the main thing I need to replace? The transformer?

Im a complete noob at those terms so any pictures? Can't afford a professional at this time and my family is getting kinda cold here.

Alright if i want to check for voltage where would i put my multimeter?

Alright here is the deal I have a Coleman Furnace (#7700B) and it has a 2 Wire AC Box attached to it. My problem is that i cut the red / white wire to my outside AC unit while weedwhacking (Terrible) now my heater and AC won't work anymore. I have tried connecting them that won't work, I've looked f...