Trouble Charts

The tree charts are designed for easy use. When you first look at a tree chart you will notice that there are three distinctively shaped boxes; square, diamond and oval.
Square Box-The square shaped box is the instruction box, used to give you instructions required to perform the diagnostic step.
Diamond Box-The diamond shaped box is the result box. This box asks you for the status of the test that you just performed according to the square instructional box.
Oval Box-The oval shaped box is the action box. This box informs you of the action required to repair the problem or move onto another test step.
This format is used wherever tree charts are found. All other troubleshooting is performed using paragraph steps.

DIAGNOSTIC PARAGRAPHS
These paragraph steps are in four major categories; fuses, grounds, power circuits and components.
The fuse category informs you of the fuse name, location and circuits the fuse controls. With this information you can quickly check to see if a fuse is damaged.
The ground category informs you of the grounds; splices, circuits, splice pack, etc., that are common to different electrical systems. If a ground is bad, this information will help you in locating the problem faster.
The power circuit category informs you of the power circuits feeding the system you are diagnosing. With this information is the circuit wire color, wire gage, and a brief description of what the circuit is operating.
The component category informs you of the components of the system diagnosed. It also may give you troubleshooting information to help troubleshoot the component.
Always verify that the system operates after a circuit is repaired, or if a component has been replaced. A System Performance Test included in most electrical systems helps you verify system operation.
Once you become familiar with the electrical systems used on Saturn vehicles you can use the Complaint-Condition Cause charts as a thought starter for electrical diagnosis.