I would have expected the relays to still work as the configuration looks ok.
As the high speed works, then the fuse is ok, so with the ignition on/aircon off and engine off,check the following:
Is there 12v at pin 30 of high relay
Is there 12v at pin 87b of high relay
Is there 12v at pin 30 of low relay
If you have a multimeter, pull out the high relay and check for continuity across pins 30 and 86b on it