I bought a DPDT switch from Radioshack and wired it according to the Shbox diagram http://shbox.com/1/fan_sw_diagram1.jpg and I get power when the switch is flipped one way but nothing when switched the opposite.

I'm just wondering where I should start looking for an issue? Fans kick on like normal when running but they sound much louder than when I flip the switch so I'm not sure If I'm just getting one fan, low speed or what?

Thanks

 

Sounds like they are running on high speed when you flip the switch.

 

I noticed today that I'm only getting the passenger side fan when I flip the switch. I'm pretty sure both come on when the switch is off though.

 

Recheck your wiring work. If it is all done like the diagram, it works correctly.

 

I have, but this is the first time I have ever done anything with wiring so something could be wrong right before me and it may go unnoticed.

So is low speed one fan and high both or do I have an issue somewhere besides the wiring since the switch can turn on the passenger fan but not the other? Also for the ground, is there a preferred way to splice into it? I'm using T-taps and thought maybe that's not the best way to get the ground to the 3 required spots on the switch?