For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Inspect the indicator lamp bulb. Is the bulb OK? | -- | Go to Step 2 | Go to Step 3
2 | Turn ON the ignition. Backprobe the PCM connector C2 terminal 35 using an unpowered test light to B+. Does the test lamp light? | -- | Go to Step 4 | Go to Step 5
3 | Replace the bulb. Are the repairs complete? | -- | Go to Charging System Check | --
4 | Check for open in CKT 225 (RED). Is repair completed? | -- | Go to Charging System Check | --
5 |

1. Turn ignition switch to the run position.
2. Connect a test lamp across PCM connector C1, terminal 16 and ground.

Does the test lamp light?

--

Go to Step 6

Go to Step 7

6 | Replace PCM, refer to Powertrain Control Module Replacement/Programming Is repair completed? | -- | Go to Charging System Check | --
7 | Inspect and repair CKT 25 for an open, if OK, inspect and repair open in CKT 439 Is repair completed? | -- | Go to Charging System Check | --