I have a spare alternator in the garage. I'll trade it out this week and see if things change. I am not sure of its condition. I will probably have to get a Bosche re-man.
The fan fuse is fine... I disconnected it last night and the light was still burning bright. Obviously not the fan causing the problem.
Thanks for the insight
76 240D (W115) - 550K miles
78 300D (W123) - 200K+ miles