Relay Location For Heater Fan Blower On '87 325

[phantom@xxxxxxxxxxxxx]

Hello.  Recently, I discovered that my blower fan will only turn on when the fan switch is turned 
to the highest position.  I'd like to rule out the relay and/or the switch before replacing the 
actual fan.  Does the fact that the fan still operates at the high setting, make anyone believe 
that the switch is faulty or the relay is malfunctioning?  Next problem:  the whereabouts of the 
relay switch for the fan on a 1987 325.

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