ok, i'll do that then, but wouldnt the AC be on a pole and C on a throw? like this:


M<----| o o | (empty)
12V-->| o o | <--A/C Clutch
+ <----| o o | ---> C


or am i all wrong?

 

It should work either way.

 

ok, thanks a lot roger!

 

(copying this to the 2nd page for easier reference):


One thing that we/you need to be sure of is which of "+" or "B" is the drain for the motors. I think it's the "+" lead, and "B" is just to power the controller.

Whichever it is, you don't want to put a switch on that lead - like Roger pointed out, it'll be high current (my fans were drawing about 17 amps). That's gonna cause some heat behind the dash and push the current rating of a normal switch.

If you want to switch the motor power source, you'll need to rig a 30amp relay under the hood.

 

a good way to think of DPDT switches are that they are simply 2 SPST switches thrown with the same pole.. so.. if the switch needs a ground and +12V line, why not just run 12V on one side, and ground on the other? I assume you're trying to turn on 2 devices and not a signal.. in which case this won't work.