Gremlins? Odd electrical failures, connected or coincidence?

[Bobby Pootz]

The following issues have occurred on my daily driver within a week.

First the passenger headlight went out, then a day later, the truck battery was dead and needed a jump. The truck started fine the next two days but the volt meter fluctuated between straight up 13 and more when first started up or less as items were used like the wipers or lights. And tonight, the fuel tank switcher died. I’m thinking these are all related.

Am I right to think it’s all connected or are these all just different issues happening at once?

1984 C10 305 CA truck and the alternator looks like the newest thing on the engine.

Thanks in advance!
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