Can you please post a diagram indicating where the Alternator is located on the 1991 LS400. Thanks

 

Pic is not a 91 motor but it's in the same spot

 

yep it's under the power steering pump (perfect spot to get dripped on and compromised if the leak isn't addressed).

note in the pic above, the power steering pump reservoir is sideways, not how it is normally oriented in the engine bay.

 

Thanks very much for the picture. Very helpful.