| Re: Overheated at the drive through Zoo |
Subject: Re: Overheated at the drive through Zoo by BillH on 2009/7/26 17:11:47 Manual Fan Switch. Moe, Here's where to put in a manual switch. Note that there are other options like the automatic switch Matthew mentioned that installs in the block, about $40. There's even a programable setup that reads temps with a probe in the radiator and is adjustable to any temp you want, $100. Peace of Mind is a good way to describe taking control of the fans. I put mine in because I didn't like with the temps that the GM engineer set. I actually rarely use it and if I hit 220 at a redlight, I know it will cool down after I get going. I really only use it in a long traffic jam. You do need to preform the maintainence on your system and get it back to normal before installing this. Any 12v. rated single throw (on/off)toggle switch will work. The switch only grounds the fan relay and does not see the high current that the relay sends to the fan. So, an inexpensive switch and 16 gage wire are all you need. Mine's wired into the secondary fan relay (which turns the pass. side fan only). The relay is the one shown in the pic, driver's side on the rad shroud. You need to make a connection to the dark blue/white wire in the relay harness. DO NOT cut the wire, just splice into it. This way you retain all the computer controled functions. Run the 16 gage wire from that splice to one pole of the toggle switch and run s wire from the other pole of the toggle switch to a chassis ground under the dash. That's all there is to it. |
