Circuit/System Testing
WARNING: This page is about a different car, the 2018 Buick Regal TourX and 2018 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition/Vehicle & All vehicle systems >> Off
- Disconnect the electrical connector: X2@A11 Radio
- Apply the parking brake.
- Engine Running & Transmission in Reverse
- Verify a test lamp turns On between the test points: Control circuit terminal 13 & Ground
- If the test lamp does not turn On
- Ignition/Vehicle >> Off & Remove - Test lamp
- Test for less than 2 ohms between the test points: Control circuit terminal 13 @Component harness & The other end of the circuit
- If 2 ohms or greater >> Repair the open/high resistance in the circuit.
- Go to next step: If less than 2 ohms
- Test for infinite resistance between the test points: Control circuit terminal 13 & Ground
- If less than infinite resistance >> Repair the short to ground on the circuit.
- If infinite resistance >> Test or replace the component: K9 Body Control Module
- Go to next step: If the test lamp turns On
- Ignition/Vehicle & All vehicle systems >> Off
- Disconnect the electrical connector: X7@K9 Body Control Module
- Ignition >> On / Vehicle - In Service Mode
- Test for less than 1 V between the test points: Control circuit terminal 13 & Ground
- If 1 V or greater >> Repair the short to voltage on the circuit.
- Replace the component: A11 Radio