chrysler voyager becker rbs sat nav head units

[martinpayne]

Hi there all new to this site ,,wondered if anyone can help me out ,,i have a chrysler voyager rb3 head unit ,i have a front rh speaker intermittently coming on then off then crackling etc ,i have been told its a possible feed or earth break in the loom ,checked speaker thats fine ,wires to speaker are grey yellow and grey blue ,,,back of the rb3 unit there are no corresponding coloured wires ,,so myqueriey is does anyone have any idea which pin is which on the back of these units ,there are 22 pins ? cheers to all !!!