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The air blower worked intermittenly and stopped working now

The air blower of my 2004 Yukon recently worked intermittenly and now stopped working. The fuse is good. Any advice?

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So you have no speeds working correct.
Its the blower or the switch its self because high speed is direct B+ from the battery to the motor. To test switch remove it from the electrical connectors and use the shop manual so you can jump certain terminals to see if the motor operates. If when you bypass the switch the motor runs the problem was the switch. Before you condem the motor check out the relay. Make sure your getting B+ to the relay and from relay to motor . . You should check resistors (gonna need specs for this ) each one (aka speeds )mandates a certain amount of resistance which is found in the shop manual. Use an ohm meter to verify this.

Posted on May 04, 2010

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