Ok, I'm too stupid to figure this out.

Anyhow, I believe my fan switch is wired up by grounding 1 of the relays...It was done by the previous owner. The fans flow a good amount of speed, but I know that they are not coming on high because when I hit the A/C button they increase dramatrically.

Too my understanding, if only 1 relay is grounded won't this make the fans run on low? The previous owner told me the fans would run on medium, but I thought medium required 1,2,3 to be grounded at the same time?

So my questions.

1. how can I be sure the fans are running at medium and not low when I flip the switch.

2. If I install an FC thermoswitch to automatically kick the fans on medium at 185F, will turning on my fan switch on top of this one yield high speed like ac button?