You can test the motor by unplugging its cord and connecting the motor terminals directly to 12 Volts. If it runs, the problem is elsewhere. If it sparks but does not blow, the motor is frozen. If it doen's even spark, there's an open circuit somewhere inside the blower motor.

Jeremy

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970