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Heater blower motor

(1990 Mercedes-Benz 300SL)
in Tucson, AZ on June 06, 2010
I installed a heater blower motor in my 300sl. And the motor only blows on the lower speed. When i first installed it the motor blew on all speeds. After five minutes in only blows on the first speed..
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on June 06, 2010
There is a blower motor speed module that controls the speed of the blower motor , I would inspect that. The wires from the blower motor get power and ground from that component.
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on January 04, 2011
where is the blower motor on the 3oosl located?
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