Subaru Tribeca 2008 Wiring Diagram PDF - manuals WIRING SYSTEM. 1. Basic Diagnostic Procedure. A: BASIC PROCEDURES. 1. PROBABLE CAUSE OF TROUBLE. Look at the wiring diagram and check the system’s. circuit. Then check the switch, relay, fuse, ground, etc. 4. LOCATION AND R EPAIR OF TROUBLE. 1) Using the diagnostics, narrow down the causes. Your Subaru Tribeca PDF will be emailed to 2008-2012 Subaru Tribeca Vehicle Wiring Chart and Diagram Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 2008-2012 Subaru Tribeca information outlines the wires location, color and polarity to help you identify the proper connection spots in the vehicle.