Trinary switch ls3 Fan on with a/c

[dhutton]

Originally Posted by randy

what harness are you using?

I was wondering same thing. Doesn't your LS harness already have a fan relay? If it does I am not sure that the VA relay is needed. Just use the trinary switch to activate the LS harness relay, assuming the ECM pulls the fan relay coil to ground.

Or if you are stuck on using the VA relay just use the ECM and VA relays to power the fan in parallel.

Don