I wanted to tow my 2003 Saturn wagon to Florida for the winter trip we had planed. I was fortunate in finding a nice used dolly. The price was right and the owner towed it to my house. It needed wiring for brake lights and tail lights. You can find kits available for your needs. The tail/brake light assemblies, connectors, and wired are available at most auto parts stores. This makes it easy to rewire the dolly or trailer.

I purchased spray paint to brighten up the dolly, that can make it look new.

The dolly had tires that held air. They looked very old. So off they go! I replaced the old tires with new ones.
The old tires held air but I wasn't going to trust them on a long road trip. These tires were 14 inch and I needed high load capability. I got Yokohama Super Van 356 14R75 tires.

The other thing I found out was that the wheel straps didn't fit the 7 inch wide 16" tires on the car. They kept falling off. Not a good thing.
When I arrived at the RV campground. (Sanlan in Lakeland FL. it's really nice.) I found that the left wheel strap had fallen off and gotten tangled in the wheel.
That destroyed the strap. I bought a new strap from Camper World, Bradenton, Fl (RoadMaster Tie Down Strap #2150) and tried that.

I messed up hooking up the strap around the wheel. I lost part of  the strap over the wheel and the back strap with the hook in the end.

When I got to my friends house in Crescent Fl, I discovered that problem. Besides that the right original strap decided to jump off too! 

Now nothing was holding the car on the dolly!
It's amazing and I thank Jehovah God that the car didn't slide off the dolly. That was really too close for comfort.
This was a rainy ride in the dark too. Because of that I didn't take the time to check it out, bad mistake.

I was able to use the long strap with the buckle under the cleat on the dolly, over the wheel from the back,  and to the ratchet tightener and that worked the best. It stayed tight all the way home.
I bought a new strap  from EBay and I now have a better setup for the car and dolly.

For the trip home I took the long strap from the RoadMaster #2150 and ran it under the back cleat and over the tire to the front ratchet.

That held really well. I should have done that from the start.  Original strap setup see below. This how it is supposed to work. I had to put the long strap that went around horizontally over the tire and run it into the strap ratchet in front.

RoadMaster #2150 wheel strap holding the wheel.

My rig with toad in tow.

The way to have fun on a trip like this is to double check everything. Leave nothing unchecked. I resorted to checking the RV and dolly at every stop. I found that something was amiss about every time.