Wiring Experts Needed [Archive] - Chevelle Tech

: Wiring Experts Needed


ss396boy
Oct 26th, 09, 3:57 AM
Does this look right? :)

Trying figure out if I got everything correct in the diagram. Lots of stuff going on in here :)

Dual fans/Fast XFI/Vintage Air trinary

My only concern was having both B3 and B11 going to the relay. The manual states they should be connected to the negative side of the relay.

B3- Controls secondary fan when TPS is reached / or Temp sensor reaches 200f
B11- To enable an A/C clutch, the ECU switches pin B11 to ground. This can be wired to the negative terminal of a relay to allow the ECU to override an A/C request from an A/C switch in the car.

Here is my diagram trying to connect all the dots:
http://img17.imageshack.us/img17/5886/fastefidualfantrinary.th.jpg (http://img17.imageshack.us/i/fastefidualfantrinary.jpg/)

Verle
Nov 2nd, 09, 8:49 PM
What they are doing is turning on the fans any time the A/C is turned on regardless of engine temperature. A lot of modern cars have this.

The other control is to turn the fans on when temperature is above the set point.

That will work fine.