A/C quit working on my 1991 420 sel. The Compressor engages the clutch, but blower fan does not come on. I suspect a fuse but I can't find the dam thing. The fuse box says it's outside the box but I can't find it. a picture would be great but any help would be appreciated. Thanks Tedley.

 

have you check behind the brake fluid reservoir, near the booster?

there's an enclosed black finger sized box which got wire on it.

 

the fuse you're looking for is F15-Aux, its located right by the brake reservoir. just as sleepwalker said

 

Found the blower fuse. Thaks for your help.