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It's either the resistor (if your vehicle uses one), the switch or possibly the lower speed motor windings (if it doesn't use a resistor).

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โˆ™ 2006-04-02 05:18:27
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Q: What could be causing the fan speed to only work at the highest setting on your 1992 Toyota 4Runner when placed at any other of the 3 settings nothing happens?
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