I am trying to install a Honeywell programable 7400 "universal" thermostat.

My current system does not match the wiring colors on the 7400.

Current system is a trolatemp by honeywell. The terminal colors are: WROBGY This is an oil forced air heat and AC system with 2 zones.

The terminals on the for a non heat pump system are:
RC R W Y G C Y2 W2

What goes where??

Any help greatly appreciated. Honeywell is closed and it's going to get pretty cold tonight with no heat.

Thanks:)

I need to know where all the wires connect at the furnace since installers don;'t always follow the rules. Typical non-heatpump connections are. Red wire to Red and jumpered to Rc. Green to G, White to W, and yellow to Y. Alot of installers use Blue for Y, something you will have to figure out.

I agree with northenheat no one wires the same. R and RC should have a jumper if only one transformer is being used. (most of the time the red wire ) . G, is the blower wire (green), W or W2 (white) is the heat, Y (yellow wire) is cooling. blue black or brown may be common ( C ). need moore info gas heat - heat pump or what.