Detail: Help me find the regulator on a 1978 Toyota Hi ace van
Solution: THAT YEAR TOYOTA USED A TIRRILL IC THE INTEGRATED CIRCUIT ITS THE INTERNAL REGULATOR MOUNTED ON THE INSIDE OF ALTERNATOR. AND THE TIRRILL EXTERNAL REGULATOR.ITS MOUNTED ON THE FIREWALL OR FENDER WELL.IF YOU DONT SEE ONE YOU PROBABLY GOT A INTERNAL REGULATOR.IF YOU HAVE EXTERNAL REGULATOR ONE WAY TO TRACE IT IS TRACE ALL WIRES LEADING TO ALTERNATOR.YOU WILL SEE WIRES LEADING TO A LITTLE SQUARE BOX WITH COVER. , Looks like this. , Hi, a 6ya Mechanic can help you resolve that issue over the phone in a minute or two. Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!