I agree, it is still good to put on connections, keeps out all water and eliminates moisture from corroding contact points

Possible the Chinese made selenoids are going bad already, my starter/alternator rebuiler recommended using the ,,Brazilian made selenoid,, years ago, thats what I use,,never had one go bad yet, just sayin.

I am going to pull them now while it's "easy" and have them gone through. I do think it's unlikely that both have the same problem a couple months apart but I'm not willing to take the chance. This problem will probably lead back to my wiring which I will also be double checking. Thanks for the heads up about the solenoids. I'll ask about them when I drop them off.

I'm hoping everything checks out, retracing wiring is never a fun time

​​​​​​Let us know what you find!