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Unread 04-11-2013, 04:32 PM   #1
ricchione
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1999 XJ Cherokee 
 
Join Date: Apr 2013
Location: Winchester, Virginia
Posts: 2
Maybe the blower motor?

Hopefully I can get some help with my blower issue. Alright, here's the story. 99 Cherokee XJ. One problem I really gotta get fixed is my defrost cuz I just failed for it. At first my defrost hardly worked and the heat blew enough that I didn't freeze this last winter, the AC worked fine. Now only a little cold and hot air comes out. I can hear the resistor (?) make a slight hum when I change the temp control, but that stops shortly after I change it. Guys, any help you could give would be really appreciated. I thought it would be the blower motor but before I go and do all the work replacing it, I want to be more certain that is the issue.

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Unread 04-11-2013, 11:38 PM   #2
CJ7-Tim
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2000 XJ Cherokee 
 
Join Date: Apr 2002
Location: out in the garage - Minneapolis, Minnesota
Posts: 20,728
Inspect the dashboard switch and wires. Look for burned/melted bits and probe for both voltage and wire continuity. Inspect the blower motor relay and wires (behind the glove box), look for burned/melted bits and probe for both voltage and wire continuity. Inspect the blower motor resistor and its wire plug, look for burned/melted bits and probe for both voltage and continuity.

Apply 12 volts directly to the blower fan motor to test the fan.
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Unread 04-14-2013, 05:35 AM   #3
ricchione
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1999 XJ Cherokee 
 
Join Date: Apr 2013
Location: Winchester, Virginia
Posts: 2
first i thought it would be an easy fix by getting a new climate control panel, so i did and still didnt work. the day i posted this. by the time i had posted this i had done all of that except apply voltage to the blower motor itself. i havent the slightest how to give it voltage.. i had seen somewhere that i might take wire and run it right from the battery to the blower motor? either way, i know i have an ohm-meter; i just dont know where. *sigh* its sounding like im going to have to replace the blower motor as none of the wiring looks damaged. quite the opposite, it looks almost new.
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Unread 04-14-2013, 12:44 PM   #4
buildin1XJ
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1999 XJ Cherokee 
 
Join Date: Oct 2011
Location: Knoxville, Tn.
Posts: 1,518
YES apply voltage directly from the battery before replacing parts.
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