As Paulii mentioned, you should take a good look at your alternator. We had two fail at almost exactly 215,000 miles, one seized, the other needed brushes.

Good (100,000 miles or so) alternators are cheap at the junk yard because they have plenty of them.

I would suggest that you take a real good look at your positive battery connection, mine had corrosion up inside the insulation on all the wires. I cut them back and resoldered them at 230,000 miles.

You should consider checking all connectors and grounds. There are several at the left front fender, including the power stage, ABS, etc. Clean 'em all and add dielectric grease.

I took apart all the connectors in the engine compartment, cleaned them, greased them and used twist ties to hold the ones that could be done. That exercise was suggested to me by a tech who found a bad connection at the power stage for me.

I did one a week, so if I had problems, I knew where to look!
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'96 855R,'64 PV544 driver, '67 P1800 basket case, '95 855, '95 854, the first three are mine, heh, heh, 415,000 miles put on 9 bricks