Because of the age of the vehicle I'm going to make an educated guess that the most likely cause is that the cooling system thermostat has probably failed. (they always fail safe - in the wide open position which keeps the coolant overly cooled and thus unable to transfer heat into the heater) I agree.
Yes, it is the same starter for both.
my heat doesnt work in my2000 lincoln ls what causes this
In the "Normal" range? Lower than normal could be a bad thermostat Does heat work?
because it's broke
could be a sticking thermostat.
the 1999 wrangler's heat only worked on high,but now it don't work at all.
Not hardly, It will not work. Wheel stud patterns are different.
if it doesnt work on 1 and 2 it could be a blower motor resistor but if it doesnt work at all check the fuses, relay and check voltage if it reads 12 v replace the motor
Check to seee if it has anti freeze.
it has a moter
When power doors fail on a 1999 Honda Civic there is a problem with a actuator or wiring. The door lock fuses should be checked. If the fuses are fine then the actuators themselves will need to be checked.
it doesnt work, it breaks it doesnt work, it breaks it doesnt work, it breaks