Question about 1993 Jeep Grand Cherokee

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AC Blower switch only runs on the high speed,

Will not operate on lower speeds

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  • lawanderson Mar 02, 2009

    Where is resistor located????

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Heater blower motor resister is bad, common problem. resister controls blower motor speeds. replace resister.

Posted on Mar 02, 2009

  • ccn7 Mar 02, 2009

    It should be under dash somewhere around blower motor.

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This circuit also operates the Power Mirror circuits and the Hazzard Flashers. You may want to check to see if these are also malfunctioning when this happens.

The Circuits for your other blower speeds go through the ignition switch along with the DRL control module, but your HIGH speed does not. So if it is your ignition switch, your HIGH speed should still work and your regular headlamps should still work. You will lose only your lower blower speeds and DRL if it is an ignition switch problem. You will have a bunch of other stuff going out if it is an ignition switch also. The ignition switch circuit that runs your DRL module also runs your Powertrain Control Module. So if it is an ignition switch problem causing your DRL to shut down, your engine will also be shutting down.

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01 grand.prix ac fan switch only works on high. has a duel temp controller when you turn fan off the only way fan comes back on is to move the temp controller levers


Hi!!
When the Blower Motor Resistor (controls blower speeds) goes bad, the blower motor works only on HIGH SPEED. REPLACE IT.
BLOWER MOTOR RESISTOR Removal & Installation
  • Disconnect negative battery cable.
  • Remove right lower instrument panel insulator panel.
  • Disconnect blower resistor connector located behind right side of dash.
  • Remove blower resistor screws and blower resistor.
To install, reverse removal procedure
Good Luck!! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa!!

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That's what it sounds like to me.

If the blower is making noise than the only thing you can do is replace it.

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Subject: 2004 isuzu rodeo...my ac/heater blower is not working


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Check fan power supply fuses,
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