there should be only two wires going from the power supply[in this case the 12V outlet ] to the fan. the hot wire[preferably] should be broken across the toggle switch , you will use only two terminals on the switch, it might be best to buy a new at least 20A switch with only two terminals. The ground will run from the ground at the outlet all the way [unbroken] to the fan.
Run the hot wire from the center wire at the 12V outlet to the switch. run the hot wire then from the other side of the switch to the hot wire at the fan. then run the ground wire from the fan all the way[unbroken] back to the outer terminal at the 12V outlet. Be sure you have a 20A automotive type fuse at the power supply to the outlet.
thanks. for some reason i didnt get the reply notice. It is all working well now
I was given incorrect wiring instructions, and
i had used a regular switch and not a 12 volt
they are great, i just want to put fans all over now. I am now ready for summer, except it is almost 1/2 over. oh well.