2003 Chrysler Town and Country switch for fan blower

2003 CHRYSLER TOWN AND COUNTRY
50,000 MILES • 6 CYL • FWD • AUTOMATIC
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SMILINGFRENCHMAN
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  • 1 POST
the switch for my fan speed control is stuck on hi. turning the nob has no affect. any suggestions? If the switch has to be replaced, is it easy to do? Dealership wants $150 just to diagnosis plus parts.
Mar 29, 2010 at 10:46 PM
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BMRFIXIT
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  • 19,053 POSTS
Suspect blower motor relay check it 1st
1-A relay in the de-energized position should have continuity between terminals 87A and 30, and no continuity between terminals 87 and 30. If OK, go to Step 2. If not OK, replace the faulty relay.
2-Resistance between terminals 85 and 86 (electromagnet) should be 75 + 5 ohms. If OK, go to Step 3. If not OK suspect blower motor relay
, replace the faulty relay.
3-Connect a battery to terminals 85 and 86. There should now be continuity between terminals 30 and 87, and no continuity between terminals 87A and 30. If OK, use a DRBIII(R) scan tool to perform further diagnosis of the relay circuits.
Mar 30, 2010 at 9:35 PM