Heater Blower Motor

On my 81' Vette, any time the inigition switch is on the blower motor turns at low speed - even with the fan switch off. Is this normal? During the restoration of this vehicle I replace the A/C control (including fan switch) and the blower motor relay. I wouldn't think it would be wiring because there should be only one way which the wiring plugs should fit. Any help would be appreciated.

Thanks,
Steve

[1979toy]

The fan is on full time to act as part of the ventilation system

[lobes290]

yeah like 1979 said thats normal

Thanks guys,
Guess I've never noticed it before. Never had a need to turn the inignition key on without starting the engine before I started restoring her.
Once again,
Thanks,
Steve

[80convertible]

FYI... a common mod is to disconnect the low speed fan wire so that it acts as an off switch. I did this by simply unpluging the low speed wire...I did not cut it...just unpluged it. Great mod for summer driving as it helps to reduce cabin heat. Along with installing a manual shutoff valve in the heater core coolant line, I really reduced cabin heat to a comfortable level.