How do you wire a single wire solenoid?

As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. Before you do any work yourself, on...

Hire an electrician. Meter feeds are usually unfused. Any mistakes will cause a nasty fire, and draw the ire of the power company, the fire department, and your local house inspectors. You do not...

There are a couple of wires on the solenoid. The big heavy wire, a cable, goes to the battery's positive terminal (on almost all vehicles still on the road). The smaller wire is the "actuation" wire,...

If the solenoid wire is not insulated the number of turns will be reduced by the uninsulated wires touching and shorting out the turns.

You don't. Every circuit needs a return wire back to the source.