For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
1 |

1. Turn the ignition switch to RUN
2. Backprobe the inoperative component with a test lamp from terminal A to the chassis ground.

Did the test lamp light?

Go to Step 2

Go to Step 3

2 | Backprobe the inoperative component with a test lamp from terminal B to B+. Did the test lamp light? | Go to Step 4 | Go to Step 5
3 | Repair the open in CKT 341 (BRN) between S701 and the inoperative component. Does the air dryer or the moisture ejector heater operate? | System OK | --
4 | Replace the inoperative component. Does the air dryer or the moisture ejector heater operate? | System OK | --
5 | Repair the open in CKT 150 (BLK) between the inoperative component and G404. Does the air dryer or the moisture ejector heater operate? | System OK | --