Question about 1999 Jeep Grand Cherokee

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99 jeep grand cherokee Blower Motor will not stop running ATC

Recently the blower motor would not turn off. Then after a month or so the blower motor completly stopped turning on.

I just replaced the resistor and wire harness. Now the blower motor is on again and will not turn off. Did I do something wrong? What do you recommend for the next steps?

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  • jboone Jan 30, 2009

    That switch seems to work fine. I can turn the amount of air coming out up or down but not off. The other switch to the right is the one that turns the system off. Do you think that needs to be replaced? Any other ideas?

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  • 318 Answers

You need to replace the switch which turns your fan speed up and down

Posted on Jan 30, 2009

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2 Answers

Location blower motor relay 95 jeep grand cherokee laredo


easter egg hunts 101. what are the symptoms.?
did you check all fuses first/ that be , first
does it blow on high?
the book covering this (FSM) is free to read.
we dont need to cut and paste it , every time asked.
here it is.
it's in the PDC
read chapter 24 yet, HVAC
then 8w (wiring) 8w42
it's all there. and not fake books, it's real the real deal from jeep.
first off the GC has 2 type HVAC sold day 1
manual system
and automatic, ATC
they are totally different. so no one can answer you, lacking that fact.
lets now look at both (extra work)
the manual system has no relay, in the PDC, there is on inside the heater control but is not user serviceable.
does the blow work on HIGH>?????????
the ATC has a large relay. but is not in the PDC, its on the side of the HVAC per below drawings

chapter 24 cover this, why not read it first?

http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service


page 8w -42-9 (ATC version only) 1 part of a complex system.
26147818-kvl5e4kdfcykuopgofwmpgkg-5-0.jpg
with the free book
a $10 volt meter all this is easy to diagnose.

the manual system the blower is hot. (fused F11 pdc)
the manual system the dash control, grounds the fan
on HIGH. if not on high does so through a RESISTOR block
that R is a relay but is part of the control. (buried)
so if you ground that wire below, called c7
the fan must blow, or fuse F11 is blown.
easy no? if the relay R , right coil is not 12v then that needs to be corrected, if fan blows hotwired, and R is not 0v out.


26147818-kvl5e4kdfcykuopgofwmpgkg-5-1.jpg

Mar 31, 2016 | Jeep Cars & Trucks

1 Answer

How do I remove heater blower motor?


1998 ATC Jeep Grand Cherokee Blower Resistor connector ...

? 0:55
www.youtube.com/watch?v=sDFLuenx9aw
Nov 14, 2012 - Uploaded by Freedomautomotive1
1998 ATC Jeep Grand Cherokee Blower Resistor connector Repair Kit (RARE 1/2 Year) ... How to Fix a Chrysler Blower FanThat Only Works on High - Duration: 16:51. ... JEEP2001 FIXING THE HEATER BLOWER CONTROL. ... Jeep Grand CherokeeCenter and Lower Dash Removal - Auto Repair Series ...

Sep 30, 2015 | 1998 Jeep Grand Cherokee

1 Answer

I have a 1999 Jeep Grand Cherokee Limitied


hello what i would do is try turnning the blower switch to a slower or faster speed you might have a bad blower speed switch also try tapping the switch knob if it comes back on replace the switch if it doesnt then simply turn the switch on and try to manipulate the connector plug at the blower motor mabye bad electrical connection if it turns on and off you may have to replace terminal ends at connector at blower motor. also you could use a test ligt at connector to check for power if it will light a test light it should run.

Feb 29, 2012 | 1999 Jeep Grand Cherokee

1 Answer

How do i change blower motor resistor on 99 jeep grand cherokee


Welcome to FIxYa.com



Blower Motor Resistor and Controller Replacement

Image Blower Motor Resistor Or Controller/Power Module Remove/Install

REMOVAL

1. Disconnect and isolate the batten' negative cable.

2. Depress locking tab and unplug the wire harness connector from the blower motor

resistor or controller (power module).

3. Depress locking tab and unplug the resistor or controller connector from the blower

motor.

4. Remove the 2 screws that secure the blower motor resistor or controller to the

heater-AC housing.

5. Remove the blower motor resistor or controller from the heater AC housing.

INSTALLATION

1. Install the blower motor resistor or controller to the heater AC housing. The

housing is indexed to allow (controller power module) mounting in only one

position. Tighten the mounting screws to 2.2 Nm(20 in. Lbs.).

2. Plug in the wire harness connector to the blower motor resistor or controller.

3. Plug in the connector from the blower motor resistor or controller to the blower

motor.

4. Connect the batten' negative cable.

leedavidian_45.jpg



Thank you for using FixYa.com

Regards, Lee Davidian

Nov 22, 2010 | 1999 Jeep Grand Cherokee

1 Answer

1994 Jeep Grand Cherokee After disconecting the battery for recharging and reconnecting the battery the blower motor runs continuously. Went through the ATC diagnostics illustrated in the Haynes man. and...


Switch ,relay resistors or motor is shorted to ground.
Start with the switch and remove each one until it stops . test the item and it will probably be the culprit. Now remember most vehicles while running will have blower motor run at a low speed all the time.
The only time this should not happen is when the ignition is off.

Apr 08, 2010 | 1994 Jeep Grand Cherokee

1 Answer

T he blower motor only works in the hi position , i believe i need a new resistor, where exactly is it located ? on the blower motor itself and inside the vehicle? do i need to tahe the blower motor out?


I have a 2000 jeep grand cherokee and recently had the same problem...only I actually replaced my blower motor before I found that it wasnt the issue. The blower motor resistor is located on the passenger side under/behind the glove box. It will have 2 screws in it and a wiring harness coming out of it. Very easy to replace. Cost is about 115-145 depending on where you buy.

Jan 20, 2010 | 2002 Jeep Grand Cherokee

1 Answer

I just bought a 99 jeep grand cherokee. The air


see if the air duct piping is still connected to the blower housing or the fan blade might have come loose from the motor and the shaft is just spinning inside the fan blade

Aug 11, 2009 | 1999 Jeep Grand Cherokee

3 Answers

Heater stopped working


check blower motor.. give it a tap when you start the vehicle and turn on the heat.. if it come on then you would have to replace the blower motor..if it does not check for fuse..

Feb 15, 2009 | 2003 Jeep Grand Cherokee

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