Jeep cherokee 2004
Most of the time these have a fan speed resistor in the cooling fan box under the dash there in there to keep them cool due to a lot of heat going through them when there on 1,2,3 and sometimes thay give up. the reason it runs on 4 is that its the highest setting and is getting the full 12 volts and does not run through the resistor. a replacment resistor should get all your speeds back
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