Did you resolve your problem? I just started to have that same problem. My A/C blower would shut off for a split second and then my radio would shut off.
That is the signal that my fuse #1 was blown. I have been through a couple of boxes of fuses and it is starting to annoy me.
Please let me know if you resolve this problem and I will likewise let you know too!
1987 260E Charcoal Grey 157,000 Miles
1987 260E Forest Green 120,000 Miles