Ground Distribution Schematics

The Ground Distribution schematics show which components share a ground point. This information can often be a time-saver when troubleshooting ground circuits. For example, in the schematic, if both headlights and the park/turn light on one side are all out, you could suspect an open in their common ground wire or the ground connection itself. On the other hand, if one of the lights works, you know that the ground and the wire up to the splice are good. You have learned this just by inspecting the schematic and knowing the vehicle's symptoms. No actual work on the lighting system is needed.