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2 things. There is a fuse behind the glove box compartment. Remove the glove box and search around. I have found it not where it was suppose to be in there. 2nd, there is a resistor in the in the fan compartment for speed control. Sometimes this burns out and the fan wont run. If you turn on the system for AC on full then check the C pump in the engine compartment. If it engaged then the panel switches are probably OK.

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Q: Where are the heater and AC fuses for a 1990 4-Runner since the fan switch and AC switch do not work and fuses are not in fuse box?
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