Remove and replace the interior fuse box assembly on a 1966 Chevrolet Corvette, including disconnecting battery, accessing fuse panel behind dashboard, and reinstalling with all circuits verified.

Warnings

Tools required

Parts

• Fuse box assembly × 1 — Use OEM specification or aftermarket equivalent
• Fuse assortment (AGC glass type) × 1 — Standard 1966 Corvette fuse ratings
• Terminal cleaning spray × 1 — Electrical contact cleaner

Preparation

1. Park vehicle on level surface and engage parking brake
2. Disconnect negative battery cable and isolate terminal away from battery post
3. Allow at least 5 minutes after battery disconnect for any residual charge to dissipate
4. Remove driver's side floor mat and position seat fully rearward for access
5. Photograph or diagram existing fuse box wiring connections for reference
6. Label each wire connection with tape and numbering system corresponding to your photos

Procedure

1. 1

   Access the fuse box location
   Position yourself under the dashboard. On the 1966 Corvette the fuse panel is located behind the dash near the center, typically accessible from the passenger side or below the center of the instrument panel. Use a flashlight to locate the fuse box housing with its wire connections and verify exact position against a factory wiring diagram before proceeding.
2. 2

   Remove lower dashboard trim
   Remove the lower dash trim panel below the steering column if present. Remove the panel mounting screws (verify exact count and locations against the factory service manual) and carefully pull the panel away from the dash, disconnecting any courtesy light wiring if equipped. Set panel aside.
3. 3

   Document existing wiring configuration
   With work light illuminating the fuse box, take detailed photographs of all wire connections from multiple angles. Note wire colors, terminal positions, and routing paths. Label each wire with numbered tape corresponding to its position on the fuse box.
4. 4

   Test and record fuse positions
   Before removal, note which fuse positions are occupied and the amperage rating of each fuse. Record each fuse's position and circuit by referencing the 1966 Corvette factory wiring diagram, since the number of positions and circuit assignments must be verified against documentation. Note that some circuits (e.g., headlights) may be protected by a circuit breaker in the switch rather than a fuse.
5. 5

   Remove all fuses
   Pull all fuses from the fuse box using needle-nose pliers if necessary. Place fuses in organized sequence on clean work surface to maintain position memory. Inspect fuses for blown elements or corrosion.
6. 6

   Disconnect primary power feed
   Locate the main power feed wire connected to the fuse box. If it is secured by a nut on a stud, remove the nut using the correct wrench size as confirmed by inspection. Carefully remove the connection and position the wire away from the work area.
7. 7

   Disconnect individual circuit wires
   Working systematically from left to right, disconnect each circuit wire from the fuse box terminals. Most connections are push-on spade terminals that can be pulled straight off with gentle rocking motion. Use needle-nose pliers if terminals are tight, gripping the terminal connector not the wire. Disconnect approximately 12-16 individual circuit wires.
8. 8

   Remove fuse box mounting hardware
   Locate and remove the fuse box mounting fasteners securing the fuse box to its bracket (verify exact count and locations against the factory service manual). Use the appropriate socket or screwdriver. Use appropriate socket or screwdriver. Support the fuse box with other hand while removing final fastener.
9. 9

   Remove old fuse box
   Carefully maneuver the old fuse box out from behind the dashboard. Thread wires through as needed to avoid snagging on other components. Inspect mounting bracket and area for corrosion or damage before installing new unit.
10. 10

    Prepare new fuse box
    Clean all terminals on new fuse box with electrical contact cleaner and lint-free cloth. Verify new fuse box matches original configuration with identical terminal positions and mounting hole locations. Compare new unit directly to old unit before installation.
11. 11

    Install new fuse box to bracket
    Position new fuse box on mounting bracket, aligning mounting holes. Install 2 mounting screws or bolts finger-tight initially to allow minor adjustment. Ensure fuse box is oriented with fuse positions accessible and terminal connections facing toward wire bundle.
12. 12

    Reconnect circuit wires
    Following your labels and photographs, reconnect each circuit wire to its correct terminal position on new fuse box. Push spade terminals firmly onto terminals until fully seated with audible click. Verify each connection is secure by gently tugging on wire. Double-check wire colors against documentation.
13. 13

    Reconnect main power feed
    Install the main power feed ring terminal onto the main power stud on fuse box. Install retaining nut and tighten securely with wrench. Ensure ring terminal has clean metal-to-metal contact with no paint or corrosion interfering with connection.
14. 14

    Tighten mounting hardware
    Fully tighten the 2 fuse box mounting screws or bolts. Ensure fuse box is securely mounted without excessive movement. Verify no wires are pinched between fuse box and mounting bracket.
15. 15

    Install fuses and initial testing
    Install fuses in their correct positions according to your documentation from Step 4. Reconnect battery negative cable. Before reinstalling trim, use test light to verify power at fuse box. Test each circuit by operating corresponding accessory: headlights, wipers, horn, radio, gauges, courtesy lights.

Reassembly

1. Reinstall lower dashboard trim panel, reconnecting any courtesy light wiring
2. Install trim panel mounting screws and verify panel is secure
3. Reinstall driver's side floor mat
4. Return driver's seat to normal position

Verification

• Turn ignition to ON position (do not start) and verify instrument panel lights illuminate
• Test headlights on low and high beam settings
• Test windshield wipers on all speed settings
• Test horn operation
• Test radio power and reception if equipped
• Open driver's door and verify courtesy lights function
• Test heater/AC blower on all speeds if equipped
• Verify all gauges respond when ignition is ON
• Start engine and verify charging system light goes out
• Visually inspect fuse box area with flashlight for any signs of heat discoloration or loose connections after 10 minutes of operation

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