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The death of a blower fan motor is usually preceded by a period during which you can hear something not right in there.
On my 1986 244, it is the sound of the turbine vanes barely rouching the housing as the fan slows. I can hear it only if the fan is operating on #3 or #4 at the time I turn the ignition off. Sound has been going on ow for months.
Did you have any such warning? If not, it may be an electrical failure (hope, hope) and thus easier to repair.
I have the cricuit diagram from the 1988 240. Your car may or may not be different.
Fuse is #3, ceramic blue 25 amp; there is nothing else on that circuit.
Power to the fan goes through a set of three resistors for speed control. All three in use on speed #1, only one on speed #3, and speed #4 gets full 12 volts.
Did switching the switch up and down ahve any effect?
There is a wire lead to the a/c switch, but it is only so that the fan will run when the a/c is set to run. No relation to the blower fan operation.
Replacing the fan motor is Plan Z, after fuse and wiring and all other checks.
Perhaps another brickster with newer wiring diagrams will respond.
Good Luck,
Bob
:>)
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