Hi,

I have a '90 Celica ST183, with the 10 speaker sound system. It has a double
din head unit (Single CD and cassette) that has died and that I want to
replace with an Alpine head unit that I have bought.

The factory head unit had a single 14 pin plug, the aerial and
another plug that looks the same as the aerial but is smaller.

The 14 pin plug looks like this:

A B C D E F G H
I J K L M N

The wires a

A - Green I - Black
B - Yellow J - Blue
C - Red K - Brown
D - White L - Red
E - White/Black M - Green
F - Blue/Red N - Pink/Blue
G - Green/White
H - Red/Black

If anyone has any information on wiring a standard head unit up to
this it would be a big help!

TIA

Andrew