Locate the main control compartment under the driver’s side dashboard to check circuits for headlights, ignition, and interior electronics. Each slot is labeled with its amperage and assigned system for precise identification.
Inspect the secondary panel in the engine bay near the battery for high-amperage circuits such as the radiator fan, fuel pump, and starter relay. Confirm voltage and continuity using a multimeter before handling any terminals.
Replace components systematically by removing one unit at a time and inserting a matching rating. Keep spares for frequently stressed circuits like horn relays and auxiliary ports to reduce downtime during maintenance.
Maintain dryness and clean contacts to prevent corrosion and intermittent failures. Apply light dielectric grease to oxidized terminals and inspect high-current paths for discoloration or looseness.
Label aftermarket modifications for audio systems, lighting, or towing accessories. Tracking each circuit ensures correct installation and prevents repeated troubleshooting during future inspections.
2016 Scion TC Electrical Panel Guide
Access the primary control unit beneath the driver’s side dashboard to inspect circuits for ignition, headlights, and interior electronics. Each slot is labeled with amperage and system designation, allowing precise identification. Use a multimeter to check continuity before replacing any component.
Inspect the secondary compartment in the engine bay for high-current circuits such as radiator fans, fuel pump, and starter relay. Keep spare components for frequently stressed pathways and document any modifications to maintain proper tracking of all electrical connections.
Locating Primary and Secondary Panels
Check under the driver’s side dashboard for the main electrical compartment. This panel controls circuits for ignition, headlights, and interior electronics. Each slot is labeled with amperage and system assignment, simplifying identification during inspection or replacement.
Inspect the engine bay near the battery to find the secondary compartment. High-current circuits such as radiator fans, starter relay, and fuel pump are located here to minimize wire length and reduce voltage drop. Use a flashlight to reach recessed connectors.
Tips for Safe Access
- Disconnect the battery before opening any panel.
- Record slot positions when removing components.
- Check for discoloration or corrosion on terminals.
- Apply dielectric grease on oxidized contacts.
- Label aftermarket modifications for easier tracking.