Locate the main interior power panel beneath the dashboard on the driver’s side, just above the pedals. Remove the protective cover carefully to expose all relay and circuit holders without disturbing connected wiring. Ensure the ignition is off before handling any connections to prevent shorts or blown links.
Label each connector and terminal as you remove them to maintain orientation. The panel contains multiple slots for relays and protective circuits that control lighting, ignition, and accessory functions. Marking each slot prevents misplacement during reassembly and allows precise troubleshooting.
Consult the panel reference chart to identify which circuit controls specific components. Slots are grouped by function, including engine management, climate control, and interior electronics. Document amperage ratings and relay types for future maintenance and replacements, minimizing trial-and-error issues.
1987 Toyota MR2 Electrical Panel Reference
Access the main interior power panel located under the dashboard on the driver’s side. Remove the protective cover carefully and keep track of all small clips and connectors to avoid misplacement.
Identify each terminal and relay by using labels or a reference sheet. The panel organizes circuits for headlights, turn signals, ignition, and accessory outlets. Marking each component helps prevent connection errors during maintenance.
Check amperage ratings for each slot before replacing any protective devices. Standard slots include 10A for interior lights, 15A for cooling fans, and 20A for main power feeds.
Locate engine management circuits on the left section of the panel. These control fuel injectors, ignition coils, and sensors. Always disconnect the battery before handling these terminals to avoid shorts or data loss.
Use the panel guide for accessory circuits situated on the right side. Slots here regulate power to the radio, interior lighting, and auxiliary outlets. Confirm slot positions match the reference chart before installing replacements.
Inspect relays for wear by swapping suspected faulty units with known working ones. Standard relays in this panel include 30A for headlights and 40A for cooling components.
Document changes and replacements by writing down slot numbers and their corresponding functions. This ensures future troubleshooting is straightforward and reduces risk of miswiring.
Test each circuit individually after reassembly by turning on related devices. Observe for unusual noises or malfunctioning lights and correct any misconnected terminals immediately before completing the panel cover installation.
Locating the Interior Power Distribution Center
Access the primary cabin power center by removing the lower dash panel on the driver’s side. Ensure all connectors and screws are stored safely to prevent loss during inspection.
Identify the main terminals and relays within the panel. These control interior lighting, wiper motors, and dashboard electronics. Labeling each connection prevents accidental cross-wiring when servicing.
Check the panel layout against a reference sheet to locate circuits for auxiliary accessories such as the stereo, climate controls, and power outlets. Confirm each slot’s amperage before replacement to avoid electrical overloads.
Test individual circuits after reconnection by activating related devices. Observe for unusual behavior or non-functioning components and correct misaligned terminals before reinstalling the protective cover.