Discussion in 'Tech Info' started by ScottyBoy, Jun 29, 2011.
Oh THAT relay. Bosch is great quality.
Which aftermarket harnesses did you have? i have one from JustChevyTrucks, and I have had nothing but problems with it.
I had one from www.ls1fans.com and it melted, left me stranded 100 miles from home in 100 degree temps. I rebuilt it completely with heavier wiring and heavier relays and relay blocks but it started melting both the 60 amp mega-fuse holders I upgraded to. The OEM harness has had no such issues.
i think I may have to go the OEM route, then...
Yeah...that write up about using AC pressure is overly complicated and in my opinion could be gone about a much simpler way.
Just use a pressure Switch, not a transducer. Wire it in series with the wire feeding the relay coil that gets activated with the AC signal.
Fan stays off when ac comes on...high side pressure rises...fan comes on.
Fan stays on till either ac is shut off or till high side pressure drops. (I'd find a switch that closes at 250psi and opens at 200. Seems ideal for automotive)
AND... for you guys that want the fan to shut off when driving down the road this will do that!.
It will eventually shut off at highway speeds and stay off till u get back to stop and go traffic.
No need to mess with more PCM configuration.
A simple switch gets it done
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