Check the driver side lower dashboard area first, as the main electrical block is mounted behind a trim panel near the steering column. Use a test light to confirm current at each slot before removing any protective link, and match amperage ratings printed on the housing.
This vehicle uses a single power distribution block that feeds lighting, wipers, radio, and ignition circuits. A printed circuit layout is often attached to the back of the cover, showing slot positions and connected components. Reading this layout helps identify which line controls each system.
Typical amperage values range from 5A for gauges and small electronics to 25A or higher for motors and accessories. If a circuit stops working, inspect both the link and surrounding terminals for discoloration or looseness, as older wiring can develop resistance at contact points.
Access requires removing a plastic or metal cover secured with screws. Keep spare links in common ratings and a basic tester in the glove compartment to restore power during roadside checks without additional tools.
1987 Monte Carlo SS Fuse Diagram and Circuit Identification
Match each slot in the under dash power distribution block with its assigned circuit using the layout printed on the cover, then verify current flow with a test light before removing any protective link. Focus on ignition, lighting, and wiper circuits, as these commonly reveal faults.
Each position corresponds to a specific system and is marked by amperage values, typically ranging from 5A for gauges to 25A for motors and accessories. Trace circuits by wire color and connector alignment if labels are faded; constant power lines are often red, while switched circuits use different color patterns. Check voltage on both sides of each slot to confirm whether the issue is in the protective link or further along the wiring path.
Exact location of fuse box under dashboard and access instructions
Look beneath the driver side dashboard near the steering column, as the main power distribution block is mounted against the lower dash frame slightly to the left of the brake pedal.
Move the seat back and kneel to gain a clear view upward. Use a flashlight to locate a rectangular block with multiple slots and wiring harnesses connected from the rear.
Access the unit by removing the protective cover, which is usually secured with screws or small clips. Keep track of fasteners to avoid misalignment during reassembly.
Follow these steps for safe access:
- Turn ignition off and remove the key
- Disconnect the battery if working on multiple circuits
- Remove lower trim panel if it blocks access
- Unscrew or unclip the cover to expose the block
- Use a tester to confirm power before removing any link
Ensure all covers are reinstalled securely after inspection, as exposed wiring under the dashboard can collect dust or be damaged by contact with pedals or footwear.
