Hello again Ernie,
Just to clarify, you are telling us the ignitor is clicking, so that confirms it's connected to the caravans 12vdc system, but the ignition wire is connected to the igniter but the other end is not connected to anything.
Assuming the wire you describe is the spark ignition wire it should be PTFE coted which makes it fairly stiff, it should be unbroken,pass through the floor plate close to the control rod, and the pass into the burner housing under the floor.
Based on your description, it seems the wire has been severed. Unfortunately it needs to be replaced, and that is really a job for a service technician as it will probably involve breaking and making gas and flue connections.
As a temporary repair which I cannot guarantee will work you may have able to join the two parts of the wire by stripping the PTFE coating off the ends, and crimping a small spade and socket. It would need to be well insulated, and I'd suggest a couple of layers of adhesive lined heat shrink tubing.