Computer controlling 2 speed fan ?
Thread Starter
Staging Lane
Joined: Nov 2011
Posts: 84
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Computer controlling 2 speed fan ? I am installing a 2 speed T-bird fan on my Ventura and have a question concerning computer control of the relays. I have added the 2 wires from the computer to control the fan operation. My question is:
1. When the HI setting in the computer is reached, will the low setting be open, as to not provide ground for the low relay?
If this is the case, I will not have to run a 3rd relay to control the other 2 relays.
Thanks
1. When the HI setting in the computer is reached, will the low setting be open, as to not provide ground for the low relay?
If this is the case, I will not have to run a 3rd relay to control the other 2 relays.
Thanks
Staging Lane
Joined: Apr 2008
Posts: 56
Likes: 1
I used a Volvo 2 speed realy to control my Taurus fan in my LT1 powered Volvo 244. I use the 2 fan signals to feed the Volvo relay. Works well. Here's a link that show how the relay works. They use a temp switches in the link for control instead of ecu signals but you get the idea.
http://www.nastyz28.com/forum/showthread.php?t=200028
http://www.nastyz28.com/forum/showthread.php?t=200028
Thread Starter
Staging Lane
Joined: Nov 2011
Posts: 84
Likes: 0
Ok, thanks. I will have to have the 3rd Aux relay then. I did see the Volvo fan relay, but I decided to go with 2 70A relays just in case it need to replace them they will be readily available. Thanks for the help.
