I don't know what that fuse is for - possibly something big like AC?

From what I've read so far a disconnected air idle control valve should provide a high idle - connect it and it should work and the idle should drop (unless the car is in the warm up phase). Skip to the section for checking that valve - if you briefly apply 12V to the correct pins (check!) it should click...

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!