LS swap cooling fans

[dwcsr]

I think you should purchase a fan relay it will make your install much easier. They come with instructions so you can just connect it and not worry about terminal numbers.

But as far as the terminal numbers go on a relay each terminal is numbered according to function.
For a 12V NC relay (Normally Closed)
#30 power in
#87 power out > this will be closed and will open when the 86 is powered
#87a power out. > This will be open and will close when the 86 is powered
#86 12v actuator power
#85 ground

We have several relay kits available at
http://www.hollisterroad.com/proddet...=C4060SXL5MTFK

This will run a single speed single fan.

[67 Burb]

Originally Posted by dwcsr

But as far as the terminal numbers go on a relay each terminal is numbered according to function.
For a 12V NC relay (Normally Closed)
#30 power in
#87 power out > this will be closed and will open when the 86 is powered
#87a power out. > This will be open and will close when the 86 is powered
#86 12v actuator power
#85 ground

You have the N.O. and the N.C. connections reversed. #87 is N.O. and closes when coil is energized, and #87A is N.C.

[dwcsr]

Originally Posted by 67 Burb

You have the N.O. and the N.C. connections reversed. #87 is N.O. and closes when coil is energized, and #87A is N.C.

You are correct for what I described.

85 = relay coil -
86 = relay coil +
87 = common contact
87a = normally closed contact