Traver8 wrote:
It is not exactly clear from your description of getting power and ground from the bathroom fan but it seems to me that you may be getting both constant 12 v from before the switch and switched 12 v after the switch and not ground. Take another look at the bathroom fan connections and be sure that you are really getting 12 v and ground.
If I misunderstood your description, sorry but that is my first impression.
Let us know more of your checks as things progress and we will try to help.
Terry
Found my meter, and confirmed I have 13.7 volts coming from the bathroom fan to the computer fans. This is with the bathroom fan off as I want to run the computer fans independently from the bathroom fan
I'm not sure what you mean by your first paragraph. There is a second switch after tapping power from before the bathroom fan on the ground side to the computer fans, thus negating being in a constant 12 volt state. I tested this wiring directly with a 9 volt battery and confirmed both the fans and the switch is wired correctly, and working.
Basically what's going on here is a 12 volt fan will work when connected to 9 volts, but not when connected to the trailer with confirmed 13.7 volts coming in.
EDIT: Oh what you're saying is (correct me if I'm wrong) that my ground switch on the computer fans will only ground if the bathroom fan is on. If that's what you mean, then I already I tested that as well. I turned on the bathroom fan after connecting everything to insure it worked. I also tried turning on my computer fans with the bathroom fan running and I still have nothing.
