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No SES codes!
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You do not have to run wires into your interior.
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No dash switch is required.
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You get a closer temerature range than computer programming.
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You can adjust it for any temerature thermostat.
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It does not interfere with normal computer function.
The adjustable fan switch is available at Pep Boys for $21.99. It is manufactured by Hayden automotive under part number 3653.
Crimp style connecters are supplied with the switch, but I suggest soldering the wires for a corrosion proof, trouble free connection.
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Start by disconnecting the battery (remember your radio code).
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Open the fuse block lid and press the release tab shown in the picture so that you can flip the block upside down to gain access to the wires.
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Carefully strip away about 3/8" of insulation on the Blue and Red wires shown in the picture. If you are using crimp connectors (easy but not recommended) you can cut the wires and strip 3/8" off each end.
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Connect an 18" piece of the wire supplied with the switch to the wires you just stripped and crimp (solder preferred). Tape the splices and replace fuseblock and lid.
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Route the wires over to the side of the radiator.
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Drill an extra 1/4" hole in the switch mounting bracket so you can use the existing bolt on the core support. Mount the bracket to the bolt and the switch to the bracket.
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Crimp (and solder) the two wires to the supplied push-on spade connectors and push them onto the switch terminals.
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Remove the top radiator cover and air box to gain access to the radiator. Route the sensor lead across the radiator as shown.
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CAREFULLY enlarge the fins to allow the sensor to be inserted between a pair of radiator tubes. Insert the sensor and use a dab of silicone to hold in place. Use a dab of silicone to secure the sensor lead to the plastic sheild covering the top of the radiator. (Although the sensor is usually mounted behind the radiator, I find it is much more sensitive to temperature change when mounted as shown).
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Replace the radiator cover and air box.
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Connect battery and confirm fan operation by turning switch adjustment screw until fan turns on. Turn the switch clockwise to turn fan off.
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Start the engine and when you can feel hot water entering the top of the radiator (which indicates the thermostat opened), turn screw counter-clockwise until fan turns on.
http://www.ls1camaro.net/highres.htm?
