I have a 1970 fj40. It looks like the PO put a aftermarket wiring system in.its definitely not stock. I am having a problem with the head lights some times the passenger headlight does not work or sometimes it is very damn. And he same goes for the turn signal .then there will be times it works just fine. Could this be caused be the fuse block getting wet? Or is this the result of a bad ground? If it's a ground were should I look. I am the worst when it comes to this type of trouble shooting and any help would be really appreciated. You will not insult me by over simplifying .thanks