heater blower motor on 1990 Mercedes-Benz 300SL

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..

by in Tucson, AZ on June 06, 2010
1 answer 1 comment
ANSWER by , 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.
COMMENT by , January 04, 2011
where is the blower motor on the 3oosl located?