If you bought a Mars 2000 series validator, then there is no extra box. That feature is mainly found on Coinco units. As far as harnessing goes, what do have right now? And what machine are they going in, and what is already (or was) in there? You will need a power harness at least for the validator. No extra harnessing for the changer most likely will be needed.

I called a company in Dallas that sells parts for vending machines, my harness will be here tomorrow. By the way this is for a DN 501-E (20 oz. bottle machine)that I purchased. It has never had a coin mech or validator installed. According to the machine itself it has only performed 308 vends in its lifetime and 0 sales. I paid $246 for it. It still has the protective paper over the graphics on the sides of the machine.

should the validator have come with the little box on the side with the led light in it? What about harnesses, what do i need and where is best place to buy? I got these off ebay so I'm not sure if I got all I need.

You should be able to get that information from the company you purchased the units from. Also go to www.meiglobal.com and they have installation instructions. I know whenever we sell units, we always try to make sure either the person wants spares, or is certain the units are faulty. This keeps customers from having the same problem, even with "new" units.

I bought the Mars TRC 6000 and the Mars VN2501. Not sure if they will come with installation instructions. I have never installed any of these. How difficult is it? Does anyone have any instructions? What about setting them up and setting this machine?

this machine is a USI model 3040. I have a dixie narco model 368 that all of the cooling equiptment works great. Can I just switch the entire compressor deck? Will everything bolt up correctly?

well I went ahead and changed the thermostat since I had already ordered a new one and it ran good for about 4 days, very little frost on lines. Then this morning it has quit cooling all together. Acts like compressor isn't even coming on. Does that sound like freon??