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It could be a fuse, and that is a good place to start. Here are some links to help:
https://www.2carpros.com/articles/how-a-car-fuse-works
https://www.2carpros.com/articles/how-to-check-a-car-fuse
https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester
https://www.2carpros.com/articles/how-to-check-wiring
https://www.2carpros.com/articles/how-to-use-a-voltmeter
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I added all of that in case you needed it. Now, if the fuse is good, I need to know if the blower works on any speed. For example, it works on high speed and no other.
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Also, these vehicles are known for having a weak connector plug at the fan motor,. Over time, they break down. I've actually seen them cause fires. So, I would really like you to check the connection to the blower motor to make sure it isn't melted or damaged in any way. I attached a picture. On the right is the connector that I'm referring to and the left is the blower motor. I highlighted approximately where the plug connects.
The blower motor is under the dash toward the passenger side. Please check that and let me know what you find.
Take care and let me know what you find or if you have other questions.
Joe
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Wednesday, July 17th, 2019 AT 6:42 PM