Help! 2004 Yaris Audio System

[potterwoz]

I have recently brought a 54 reg Yaris and it only has the standard radio/casette. I have brought a casette to aux adapter and thats fine and also some some JBL speakers that I have seen on here to replace the OE ones. However it seems the only pair of speakers in the car is on the dashboard. Is their any other connections for speakers in the car and if not how could I go about putting more into it?

P.S I have some knowedge of electronics because I am currently studying engineering. :wink:

[CTScott]

Start by checking the R2 connector on the radio for wires in the 4 pins that would head back to the rear speakers.

R2-1 RR+
R2-3 RR-

R2-2 RL+
R2-6 RL-

40077

[potterwoz]

Thankyou I will do. Any suggestions for an aftermarket HU that wll fit nicely and simple to install (instructions would go down a treat)