FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Test A: No Power in All Ignition Switch Positions

Pinpoint Test A: No Power in All Ignition Switch Positions
Refer to Vehicle/Diagrams, Power Distribution for schematic and connector information.

Normal Operation
Battery voltage is provided to battery junction box (BJB) fuse 1 (30A) along circuit 2037 (RD). Fused battery voltage is then provided to the ignition switch from BJB fuse 1 (30A) along circuit 1050 (LG/VT). The ignition switch then provides power to the central junction box (CJB), the driver door module (DDM) and the lighting control module (LCM) through several different circuits depending on the ignition switch state of operation. The ignition switch has 4 possible states of operation:
^ OFF - No power on any circuits
^ ACC - Power on circuit 296 (WH/VT)
^ RUN - Power on circuits:
- 296 (WH/VT)
- 687 (GY/YE)
- 1717 (VT/OG)
^ START - Power on circuits:
- 1522 (DG)
- 1717 (VT/OG)

This pinpoint test is intended to diagnose the following:
^ Fuse(s)
^ Wiring, terminals or connectors
^ Ignition switch

A1-A3: