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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (HVAC System - Automatic) >> Diagnostic Information and Procedures >> DTC B0248, B0249, B0268, B0269, B0408, B0409, B0414, B0418, B0419, B0424, B3748 or B3749 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install a 10-amp fused jumper wire between the control terminal A and 12 volts. Momentarily install a jumper wire between the control terminal B and ground. The appropriate actuator shaft should rotate.
    • If the function does not perform as specified, replace the appropriate actuator.
  2. Reverse the jumper wires; the appropriate actuator shaft should rotate.
    • If the function does not perform as specified, replace the appropriate actuator.
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