There are two 20A fuses in parallel for the blower, both located in the Fuse & Link Box under the hood. They both need to be good. Most of those double-throw relays you just need to depress the latch tab, but the terminals often get stuck and make them very hard to extract. The tab catches on the pawl shown by the red arrow in the pic. The two orange terminals should be hot all the time, yellow should go hot with the key.