I was running a new power line for my fridge plug and stumbled across this issue. I have only had this vehicle 6 months so I do not know when the battery was installed. The positive terminal was not tight on the battery. It appears the battery posts may have been too small. There was a plastic piece that prevented the clamp from closing all the way onto the post.
The black plastic piece sits between the terminal ends and it is sandwiched. It prevents them from tightening up. I removed that piece and it seems to be holding tight. Is this an issue with an incorrect battery size or a worn out and stretched terminal? The battery is an Interstate labeled MTP-27F. The problem I have now is I cannot remove that nut that goes from the fuse box to the terminal. I tried WD40 but it is stuck good. I do not see an easy way to remove this without causing problems. Any new terminal I install would require this nut to be removed.