I have swapped the stereo out of my old mondeo and put it in my transit. I have swapped the connectors straight across but now have only 1 speaker(nearside) working. Can anyone shed any light on how to correct this? is additional harnesses required? the transit is a 2001. Appreciate any help i can get on this guys thanks.

 

sure you aint pulled a wire out as its normally a plug and play straight swap