Circuit/System Testing
WARNING: This page is about a different car, the 2008 Saturn Outlook, 2008 GMC Acadia, and 2008 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
Test or repair open, short to ground or short to voltage on the RSA ground circuit and battery positive voltage circuit.
- If all circuits test normal, replace the rear HVAC control module.