I'm looking at the schematic and I see two relays: an aux fan preresistor relay (K10) and an aux fan relay (K9). I can see the aux fan pressure switch that I jumped (S32), and it looks like that relay runs a separate voltage to the aux fan preresistor relay (K10), then to the preresistor (R15), then to the aux fan (M4). Am I supposed to hear the preresistor relay clicking when I jumper S32 with the key on?

It looks like the aux fan relay itself (K10) sends separate power to the fan, probably in a stepped-up voltage. My high stage fans (I'm now presuming that they are running at full speed) are working okay and come on at 92 C, where the Cool Harness is supposed to activate them.

I have no idea where either of the relays are located under the hood though. Can anyone help point me to them?

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1993 400E, 256,000 miles (totaled)
1994 E420, 200,000+ miles
1995 E420, 201,000 miles