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Switch or motor?

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Old Jun 17, 2007 | 12:54 PM
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Default Switch or motor?
OK, here we go again. On a '75 coupe, Which is more likely to be the problem? I only have two of the four speeds on my heater blower, one and three.Should I start by changing the switch or should I get a blower motor and start with the most likely problem?
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Old Jun 17, 2007 | 01:17 PM
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Old Jun 17, 2007 | 02:13 PM
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The easiest troubleshooting point is the connector on the resistor pack on the top of the evap box. Check for voltage on the different pins associated with each switch position.
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