Circuit/System Testing
WARNING: This page is about a different car, the 2018 Cadillac CTS. 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