Hi, I have a 96 300tdi discovery jap import and the speedo is reading about 8mph out. I have fit a new sender unit but still have the same problem. Anybody come across this before and do you think the answer is a new speedo head ? my next question is about the windscreen wipers parking. Is the...

Hello everybody ! I need help with fitting a radio to a 96 disco 300tdi jap import. I have power to the head but cant get anything out of the speakers. There is a cd changer fitted, 3 plugs were the radio should be. i think the speaker plug is 8 pin with 4 black wires a red, green, yellow...