i have the lt1 fans ready to install and am trying to decide how to do it. i know everyone hates talking about it BUT, i'm gonna ask anyways. i was just wondering if it would hurt to have one on a constant power source that is on when the ignition is on. and the other on a switch. when i bought them they didn't come with relay or harness or anything and i was thinking about doing it that way unless anyone has any better ideas.

Matt

 

My friend installed LT1 fans on his 99 GMC this past weekend. He just ran the wiring to the fuse panel and found a fuse that had power with the key. so both of his fans come on with the key. The truck runs cooler now than it did before but he plans to hook one fan up to the a/c compresor since it doesnt seem to need both fans all the time. Hope this helps some.

 

what will hooking it up to the ac compressor do? what wire would i splice it into on the compressor?

 

There are only two wires on the compressor, power and ground. Ground is black, power I think is green. You will want to use a relay though, don't try to wire the fans directly to the AC compressor or you will blow it up.

 

gotcha, but what problems will wiring one to be on all the time and one on a switch involve? would there be any problems at all?

Matt

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by slowverado:
<strong> i have the lt1 fans ready to install and am trying to decide how to do it. i know everyone hates talking about it BUT, i'm gonna ask anyways. i was just wondering if it would hurt to have one on a constant power source that is on when the ignition is on. and the other on a switch. when i bought them they didn't come with relay or harness or anything and i was thinking about doing it that way unless anyone has any better ideas.

Matt </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That is how I have mine wired, except I have switches on both, but I just leave the one on that comes on with the ing. If you wire them separate, I suggest useing a 30a relay on each fan for power and rune one that will be completly manual to the batt with a 25a fuse. Also I would use 10g wire for the power runs and 16 for the switch runs.

Greg

 

so basically you have it direct wired and one is always on when the ign is on but it still has a switch, and the other u only use as needed? right?

Matt

 

Pretty much the only negative effects would be the fans would ware out sooner than usual and it'll take like a week for the engine to warm up in the winter time.

 

very true...i hadn't thought about warming up. so what does wiring it to the ac compressor do? how does all that work? where would i find the two wiring harnesses for the lt1 fans.

Matt