Does anyone know where to find this on my Astro. I checked all other components from the switch to the fan and everything works. This is about the only part left. Haynes manual shows the relay in the schematic but gives no clue where to find it on the van.
Thanks in advance for any help you have.

My '97 has the blower high speed relay in the "resistor box" for the multi fan speeds. It's in the blower motor box, just behind the windshield washer/ overflow reservior. I found that the sealant had eaten a printed wire on the board. Just solder a new wire over the missing printed wire.
Hope this helps.

Thanks Drew. I will look into that. It would be an easy fix if the one in mine is in the same place.