Need some basic electrical advise Options

[Downerman]

This is a Renegade 914 with a small block chevy. Aluminum radiator with dual fans up front that automatically engages with a temp sensor. There are two relays on the fan shroud but when the temp sensor kicks, both fans come on.

So, with that information, I also have a A/C unit that is a popular unit sold for hotrods and other custom applications. It mounts pretty nicely under the passenger side and the install was pretty straight forward. What I just learned though.... the A/C unit will never work properly while I'm filling and testing in my garage and I don't reach fan kick on temp of 195 degrees.

My question is this. I need to hook my compressor power wire additionally to my fans so regardless of what temp the car is at, when the A/C is flipped on, the fans turn. on. I'm worried though because what would happen if I had the A/C on with temp below 195 and fans a blazing, then temp rises and hits 195 and gets the signal from the temp sensor to turn on?

Seems like a fairly simple circuit but do you think I would need another relay from the A/C compressor power wire?

I'm struggling with this and bet someone has been down this road and could maybe help me out.

Thanks,

Dave

[somd914]

I believe what you want to do is have the AC power set a new relay as mentioned above. Agree that the temp switch (sensor) on the radiator likely completes the ground for the existing relays. You would have the AC relay complete the ground for the existing fan relays also, thus wired in parallel with the temp switch.

Does this make sense? Hope I'm not off base with my interpretation of the situation.