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To test a blower relay, first, locate the relay in the fuse box or under the hood, depending on your vehicle's design. Use a multimeter to check for continuity by removing the relay and testing the terminals; a functioning relay should show continuity between the appropriate terminals when activated. Alternatively, you can swap the relay with a similar, known-good relay to see if the blower operates. If the blower works with the replacement, the original relay is likely faulty.

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4d ago

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