If you are saying the Blower Motor only works on high, then your problem is a defective Blower Motor Resistor Pack. Replace it.
Sounds like your heater core is bad and your engine is low on coolant
How do you bypass the alarm system on a 1990 Dodge Dynasty?
Dynasty Cup was created in 1990.
Yes.
Green.
The proper tire size for a 1990 dodge dynasty are P195/75R14. These tires are a 14 inch size tire.
Drain the water from your 1990 Chevy Corsica cooling system. Remove the heater core water supply hoses. Remove the heater core retaining bolts. Reverse the process to install the new heater core.
Why does my heater control lights flash on an off on my 1990 Z71
Have you flushed the heater core?
Could be a bad thermostat or heater core
12V
no.