My 98 S70 only has a cassette player. I have a cd changer already and I'm about to intall it as soon as I post this. I have to positive wires in the player. Where do I find the positive wires in the car? I know that one wire (red) goes to the battery, and the orange goes to the ignition switch but where are these located? I'll appreciate your advice.

 

Don't know if this link can help?

http://www.volvoclub.org.uk/pdf/850_6CD_Changer.pdf

Good Luck and hope this is not too late.

 

get a wiring harness

 

What HU do you have? If it is the SC 811, which has a button for CD but no CD player, it may already be wired for the changer. Pull the radio out of the dash and see if there is a CD cable already plugged into the unit. It was on my sons 850 and we found it plastic tied to the wire bundle going to the tail light on the drivers side. Simply plugged it into the CD changer and that was all it took.