I plan on using my wife's 2002 Volvo S60 to do part time towing duty of my TD. I haven't got the hitch yet but it's on the way. My dilemma is this; I can not find a wiring harness for this except for the Volvo part that comes with the hitch for a total installed price of around $800-900. I have tried to find info about wiring this car up, but haven't really found much info. The problem that I think I will encounter is that there is a read-out on the dash that tells you if there is a burned out light, so I assume it knows this by a difference in resistance, which would change if that circuity also powered a trailer light.
Does anyone have experience with this?