Hi BB,
One other thing you might look at is the battery contacts. I had a problem with one of my tender's where one of contacts were bent down and didn't make contact with one of the battery contacts. I would put a small piece of rolled up paper under the hatch to push the battery down until I finally removed the tinder body and slightly bent the two contacts up. now it works fine.
Good luck.
Adam
One other thing you might look at is the battery contacts. I had a problem with one of my tender's where one of contacts were bent down and didn't make contact with one of the battery contacts. I would put a small piece of rolled up paper under the hatch to push the battery down until I finally removed the tinder body and slightly bent the two contacts up. now it works fine.
Good luck.
Adam