What is the location number of the air pump relay power distribution box under the hood of a 1998 ford expedition?

I was looking at the power distribution box diagram for your 1998 Ford Expedition and it shows ( 6 ) relays but none of them are labelled for the air suspension In the P D BOX : fuse # 4 is a 15 amp mini fuse for the air suspension service switch and fuse # 15 is a 50 amp maxi fuse for the AIR SUSPENSION SOLID STATE COMPRESSOR RELAY ------------------------------------------------------------------------------------------------------- Just adding to my answer : I did a Google search and found that the solid state air compressor relay is mounted on a bracket near the passenger side headlight