OK,
Hard hose is intact, no cracks and seems to seal tight. Clips on both end are intact.
Pulled the air pump: visual inspection all rivets look fine no gaps in the seams between top bottom and middle pieces the rivets secure. Plastic clips are all also intact.
Checked for 12v at the red/yellow wire coming into the pump with ignition on. No voltage, but looked in ETK and Bentley and there is a relay from the air pump. Not sure how to test the inbound power.
Applied 12V directly to the air pump. Nothing. May seem obvious, but do these pumps generally fail? I'll cross check PN# and head out to the yards to see if I can locate an operating one after lunch as a new one is $350.
Interesting that this PN# does not show up in REALOem. am I reading it correctly? 1172 1 432 593
Thanks for reading, feedback welcome.