If this is duplicate please let me know. My 4wd light is blinking and won't engage. I pulled the actuator motor and soldered it.... no dice. I did just realize when going from 2wd to 4Hi, the blinking light is actually 4Lo. I was in HI and it never blinked HI, only Lo. That is the piece I can't find in a search. Please help (missing my 94 hilux locking hubs!)

 

Read something about a diff plug behind the radiator coming loose. Anyone EVER heard of this mythical plug?

 

So I've moved back to the 4wd actuator. Found a bad vacuum line (photo) but that didn't fix it. I want to try these sensors maybe. But can't find the part number.