Hi all,

Trying to install a new headunit into my 91 Hiace and can't find a wiring diagram anywhere.

Does anyone have this info they could post?

Cheers

Ok I don't have a wiring diagram (they are impossible to get!) but here is some basic info:

You will find maybe one or two plugs that used to plug into the factory radio.
On these there will be the following:

Grey with silver bands = ACC feed (ie +12V when key is turned to ACC)

Red with silver bands = Permanent +12V. Wire this one to the YELLOW wire on your head unit (keeps the memory up).

Find a good ground point (usually a bolt in behind the dash) to attach the black wire from your head unit.

This should be enough to get the unit powered up.

Next you will need to find the speaker wires. A multimeter is useful here. With my radio installed I can only see one pair of them.
One wire is a peppermint green colour, the other is white.

With your multimeter you simply test around between pairs of wires until you find some that measure between 3 - 8 ohms.

Eventually you can work out which pairs are speakers, and by applying audio from your head unit you can confirm if they are left or right side.

Good fortune!