A/C Blower speed in '87 GN

[Slick87gn]

OK I wasn't getting Hi blower speed on the fan so I replaced the relay and Viola! hi speed works. But shouldn't there be a wider range of speeds on the fan ? 1,2 3 sounds like its putting out about the same fan speed.
EDIT- 1 is low 2 is med. 3 is low.could it be the resistors and where are they located.

 

[Woody]

My low and medium speed seem to be about the same, however my high speed was significantly faster........Where did you buy your relay? My high speed went out also. I don't know which of the relays is for the high speed.

Thank you!

Woody

 

[99ssconv]

The lower speeds work off a series of resistors, you could put a test light or voltmeter in place of the blower motor to verify proper operation, the higher the fan speed the brighter the light or more voltage on the meter.

 

[ecna]

The relay is bolted to the fiberglass box right by the blower motor.

From CARQUEST its a RY20 or 208859.

Eric