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2003 jeep wrangler blower not working on high. replaced resistor after all settings quit, but still nothing on high setting.

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Have to use your DMM to do some voltage drops

Need a wiring diagram, of at least the part of the system
your working on

I wouldn't & don't or ever have owned any vehicle without
having a full set of Factory Service/Workshop manuals,diagnostic
& emission & wiring book

Without info,you can't even push & poke or guess at anything

Have to see it on paper or you got nowhere to start any testing

If you work with the info needed, you can test the system & it's
components, instead of your approach to install parts,then what!

Posted on May 15, 2014

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2003 jeep wrangler blower not working on high


Sounds like the resistor block that controls your blower motor has started to go.this is a replace only to fix this problem.Go along to your local parts store and see if you can get a new one,if not its to the dealer.With the new part in hand go under the dash on the passenger side,and look for a loom of wires that will be close to the blower motor.The resistor block will be in the air box somewhere( for cooling purposes) and is usually held on with two screws. disconnect the wires first then remove the block.reverse for install.good luck

May 14, 2014 | 2003 Jeep Wrangler

1 Answer

My 1998 Jeep Wrangler Heater Motor only has one speed High. Nothing on any of the lower ones, no matter on ac or heat. What could be the problem?


This is 100% the Blower (Fan) Motor Resistor located near the Blower Motor.
This is a very common problem with Chyrsler, Dodge, Jeep and Plymouth. The key symptom is the Fan only working on High.
This is very easy to access and replace.

Let me know if this helped....

May 13, 2010 | 1999 Jeep Wrangler

2 Answers

Have a 2003 Jeep Wrangler, Rubicon and the hear/AC blower fan only comes on in the high position. The other setting low, med and med/high the blower will not come on. Is this the controller it self?...


The problem usually stems with the blower motor resistor,high speed by-passes it and there-fore the controller is sending power but the resistor has gone open and the speeds can't be regulated.

Feb 08, 2010 | 2003 Jeep Wrangler

2 Answers

Blower motor for heater only works on high....what do you think I need to change. Relay or Resistor.


If the heater only works on the high setting, your problem is the heater fan resistor, not the relay.

Jan 07, 2010 | 2005 Jeep Wrangler

1 Answer

2000 Wrangler blower won't work


HOT WIRE BLOWER MOTOR IF IT WORKS PROBLEM IN THE BLOWER RELAY AND RESISTOR.IF BLOWER DONT WORK REPLACE IT.

Sep 02, 2009 | 2004 Jeep Wrangler

2 Answers

My 2003 jeep wrangler AC/heat fan doesn't blow any air out.


You can test both of them once you have it apart. I have given you instruction below. Please follow them as injury could result.


REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

CAUTION: Stay clear of the blower motor and resistor block (Hot). Do not operate the blower motor with the resistor block removed.

Disconnect and isolate the battery negative cable.
Remove the glove box from the instrument panel (Refer to 23 - BODY/INSTRUMENT PANEL/GLOVE BOX - REMOVAL).
Pull out the lock on the blower motor resistor wire harness connector to unlock the connector latch (Blower Motor Resistor Block- Typical).
Depress the latch on the blower motor resistor wire harness connector and disconnect the connector from the resistor.
Remove the two screws that secure the blower motor resistor block to the HVAC housing.
Remove the resistor block from the HVAC housing.

Jun 20, 2009 | 1999 Jeep Wrangler

2 Answers

Heater blower switch only works on high


I'd replace blower resistor, usually found under hood on firewall on passenger side, or on duct work, inside under dash on passenger side,close to blower motor.

Jun 01, 2009 | 2004 Jeep Wrangler

1 Answer

I have a 2003 jeep liberty and the heat only blows on speed 2 and 4 would i need to replace the whole blower motor or just the resistor and if it is just the resistor,is it located in the glove box?


spray it with electric spray contac cleaner right in where the switch is work the switch after you spray it.check resistor for low amps if high replace it.

Feb 21, 2009 | 2006 Jeep Wrangler

1 Answer

Wrangler jeep heater/AC fan


Usually, when the fan works only on high speed the issue is with the blower motor resistor. It will be located under the dash close to the blower motor itself. It will have a multi-wire plug and feeds signal to the blower motor. An updated resistor maybe available in which case a slightly larger hole will have to be cut for the new resistor. This is not a difficult proceedure, only a couple of screws are holding the resistor in place and most resistors are resonably priced. I recommend you buy the resistor at the dealer, this is a case where you get what you pay for.
Good luck, hope this helps.

Jan 18, 2009 | 2003 Jeep Wrangler

1 Answer

03 wrangler heater-A/C only blows on high.


Check the blower motor resistor, I,m not sure where it is located on your vehicle most are on the firewall under the hood.

Nov 12, 2008 | 2003 Jeep Wrangler

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