ok i had a sony hd in my 106 working fine, took it out about a month ago , now ive decided to put it in my dads primera, ive checked all the wires for positive and negative (black negative constant, yellow + const, red + on ignition , orange + on lights on) , and wired it up correctly , but when i plug the conection into head unit i dont see the voltage on the yellow and black , any ideas
thanks