drosen, if both tests fail, the most likely suspects are fuses and fan motor or wiring to the fan motor. There are 2 fuses and two relays involved with the aux fan. You said that fuse #1 is indicated as aux fan, but that doesn't agree with the electrical schematic, which shows fuses 7 and D. One is for the coil side of the relays (shown in the attached photos as B and C) and the other fuse is for the load side, I don't recall which at the moment, but both fuses should be checked before you do anything else. Best to remove both fuses from their holders, inspect carefully, gently clean up the metal end caps and re-fit them into their holders. Then redo your jump test at the red high pressure switch. Do you hear a relay clicking? If yes, the relay coil is working but power isn't getting out of the relay. Replace relay in position C. If that doesn't do it, suggest you check voltage (key on, engine off) at both sides of the series resistor located down low behind the driver side headlamp assembly. If there is battery voltage on both sides, it points to bad fan motor or the wiring to the fan. But before replacing motor, tap gently on the fan hubs (you have 2 aux fans) to be sure the fans aren't just stuck, but still functional.
