With that age car you have the possibility of rust/corrosion/mice.
I'd start looking at anything exposed to air and water.
It is located under the dash near the blower motor.
On the firewall to the right (when facing the firewall) of the blower motor.
blower fan location on a 1979 lincoln
usually whats known as a blower resistor
on fire wall engine compartment
Yes. First check to see that you have 12 volts to the blower motor. If yes, blower motor has probably failed. If no, it may be the blower motor relay or there is a speed control resister pack causing your problem.
I had water leaking at the base of the windshield on a Ford F-250. It would run down the inner firewall onto a control module causing lights, blower fans and all sorts of wierd things to turn on with no key in the ignition and the vehicle not running.
If I'm not mistaken, it's behind the glove box passenger side.
blower motor resistor thermal limiter is blown. Replace the blower motor resistor.
Remove the wiring harness from the back of your 1986 Lincoln air conditioning blower motor. Remove the blower motor retaining bolts. Remove the fan on the front of the blower motor. Reverse the process to install the new blower motor.
a mouse has built a nest in the the blower cage
On the engine side of the firewall located approximately behind the position of the HVAC control module in the dash