my 1999 lincoln town car heater fan speed does not work please tell me whats the problem all fuses are good

simpler systems had a blower motor resistor. it is the next connector up the harness from the heater blower. it is a set if resistors and a thermal limiter............complex systems may have a blower speed controller.......so heres hopin you have the simple one. different types are manual, atc, and eatc. as years passed town car was not trying to be all electronic like the continental, but you could simplify by identifying the system you have and when you test, or look things up it saves time.