For 1990-2009 cars

## Vacuum Fluorescent Display Inoperative - Heater and Air Conditioning (A/C) Control Buick

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Interior Lights Dimming System Check | -- | Go to Step 2 | Go to Interior Lights Dimming System Check
2 | Inspect for an open or short to ground in CKT 724 (PPL/WHT) between the radio and S267. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems. Is CKT 724 OK? | -- | Go to Step 3 | Go to Step 4
3 | Replace the radio. Refer to Radio Replacement in Entertainment. Is repair complete? | -- | Go to Interior Lights Dimming System Check | --
4 | Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems. Is repair complete? | -- | Go to Interior Lights Dimming System Check | --