So, I have a 1.25" hitch I installed on my vehicle which is a 2002 Saturn Vue for about 2 years now. It's only use is for my bike rack. But I now want to be able to tow a small utility trailer when need be but do not have a light harness to plug into. After calling the local trailer shop, the guy says to me that he could order a harness in and have it in a day and it would be 60 bucks. He also said he " thinks " it's the kind that I would also need to connect to my battery. Not really having any experience with this, is this the only option?