I will not offer you any electrical advice, but I will offer some other advice.
You should NEVER agree on any price, until you kick the tires in-person(or find someone to kick them for you) , review ALL of the paperwork...mechanical, electrical, HD, any documentation from previous events, etc. The less that is available, the more you pause, and wait until the documentation can be gathered by the current owner, and if the current owner is not the original owner, dig deeper. It is a moving vehicle? Title search, DMV reports. You need to cool down a little, because if that owner knows you know so little about the business, and the electrical aspects, you may find yourself quickly manipulated into a quick sale, because there are (of course) soooooo many other interested parties, in this truck (or so you will be told).
One more thing, since I am one of the few women in this section. Is your gf going to be involved in your business? If she feels neglected now...oh honey! Wait until you hit the road, for work!
There are a few pros and many cons in being involed in a relationship that carries over into business. Sometimes that other person knows EXACTLY what you are thinking, without you saying a word. That can be a VERY GOOD THING or a VERY BAD THING! But, the very good things tend to be distracting, and meanwhile, the bacon is burning!!
The financial aspects of business and relationships...are quite stressful. So, do not neglect your gf, when you are not working. But, be careful about too much mutual involvement in business/pleasure ventures, unless you get married and she is a VERY understanding and patient woman, with a great sense of humor!
<message edited by CCinNJ on Sun, 12/28/08 3:28 AM>