Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: The VOLT indicator or CHECK GAGES message with the engine outline telltale is inoperative. | ||||
1 | Inspect the indicator lamp bulb. Is the bulb OK? | -- | ||
2 | Turn ON the ignition. Backprobe the RED PCM C2 terminal 16 using an unpowered test light to B+. Does the test light go on? | -- | ||
3 | Replace the bulb. Are the repairs complete? | -- | System OK | -- |
4 | Backprobe the instrument cluster circuit 25 BRN wire using an unpowered test light to B+. Refer to Section 8A for the terminal number of the corresponding instrument cluster. Does the test light go on? | -- | ||
5 | Inspect the contact at PCM C2. If OK, diagnose the PCM output. Refer to Engine Controls . Repair as needed. Are the repairs complete? | -- | System OK | -- |
6 | Refer to the Section 8A for a complete electrical system diagnosis. Repair as needed. Are the repairs complete? | -- | System OK | -- |
7 | Inspect the BRN 25 wiring to the PCM for an open. Inspect the C200 terminal C4. Refer to Section 8A. Repair as needed. Are the repairs complete? | -- | System OK | -- |
Oldsmobile vehicles with gauge cluster UH8 or U2A receive change light input via Uart Dataline. Refer to Section 8A for diagnosis.
