Question about 1999 Jeep Wrangler
Originally the control for which vents the heat and a/c would blow would periodically not function, then they only blew out of the dash vents at full blast, now they do not blow at all.
I would check the switch, but as jrc3 said, something has caused it. I would track the entire wire harness from switch to motor and replace all. There is a short some where and it will eventually burnout your fan motor also.
Posted on May 03, 2009
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Posted on Jan 02, 2017
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Diagnostic System Check - HVAC Systems - Manual in HVAC Systems-Manual for 2.2 L with DTCs
Diagnostic System Check - HVAC Systems - Automatic in HVAC Systems-Automatic for 4.3 L with DTCs
The Diagnostic System Check will provide the identification of the control module(s) which command the system.
The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.
Review the Description and Operation information to help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation.
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