'90 300TE Aux Fan Control

[kaldonia]

After my ac compressor seized up later last year, I sidelined the wagon because the clutch would not spin. I replaced my ac compressor but have not charged the system yet. I plan to purge the system first and then vacuum the lines. My question is - My aux fans are not operating at all and I'm curious on whether this is because the cooling system is not charged. If this is the reason, then I know I need to do this right away.

Thanks