Remove and replace the interior fuse box assembly on a 1970 AMC Rebel Machine, including disconnecting the battery, removing trim panels, disconnecting all fuse block circuits, and installing the new fuse block.

Warnings

Tools required

Parts

• Interior fuse block assembly × 1 — Use OEM specification or direct replacement
• Fuse block mounting hardware kit × 1 — Use OEM specification if original hardware is damaged
• Wire terminal assortment × 1 — Packard-style terminals for 1970 AMC
• Dielectric grease × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and apply parking brake
2. Disconnect negative battery cable and secure away from battery terminal
3. Allow vehicle to sit for 10 minutes to discharge any capacitive circuits
4. Remove driver's side kick panel and lower dash trim panels for access to fuse box area
5. Photograph or sketch the existing fuse box and all wire connections from multiple angles
6. Label each wire circuit with masking tape and numbered markings corresponding to fuse position
7. Set up adequate lighting in the footwell area as the workspace is poorly lit

Procedure

1. 1

   Access the fuse box mounting area
   Locate the fuse box mounted to the left side of the steering column support bracket under the dash. Remove any additional trim panels or covers blocking full access to the fuse box and its mounting hardware. On the Rebel Machine, the fuse box is typically mounted with two screws to a bracket near the firewall.
2. 2

   Document fuse positions and ratings
   Before removing any fuses, note the amperage rating and position of each fuse in the block. Create a written diagram showing which fuse protects which circuit. The 1970 AMC uses a mixture of AGC glass fuses in various amperage ratings from 5 to 30 amps.
3. 3

   Remove all fuses from the block
   Pull each fuse from the fuse block and store them in labeled containers or tape them to your diagram in the correct positions. This prevents accidental shorts during wire removal and makes it easier to test circuits later.
4. 4

   Disconnect the main power feed wire
   Locate the main power feed wire from the ammeter or alternator, typically a heavy gauge red wire connected to the back of the fuse block with a ring terminal. This wire carries full battery current and must be disconnected first. Remove the securing nut with a wrench and carefully move the wire aside, ensuring it cannot contact ground.
5. 5

   Disconnect individual circuit wires
   Working methodically from left to right or using your labeling system, disconnect each individual circuit wire from the fuse block terminals. Most connections are push-on spade terminals. Use needle nose pliers to grip the terminal connector, not the wire itself, and pull straight off. If terminals are corroded, gently wiggle while pulling.
6. 6

   Remove accessory circuit connections
   Disconnect any accessory circuits that may be spliced into the fuse block area, including radio power, heater blower, windshield wiper motor, and lighting circuits. The 1970 Rebel typically has 8-12 individual circuits running through the fuse block.
7. 7

   Remove fuse block mounting hardware
   Remove the two mounting screws securing the fuse block to the support bracket. These are typically Phillips head screws. Support the fuse block as you remove the final screw to prevent it from falling and damaging wires still in the area.
8. 8

   Extract the old fuse block
   Carefully maneuver the old fuse block out from under the dash. The confined space requires rotating and angling the block to clear the steering column and other obstructions. Check that all wires are completely disconnected before forcing the block free.
9. 9

   Inspect and clean wire terminals
   Examine each wire terminal for corrosion, burning, or damage. Clean terminals with a wire brush and replace any terminals that are melted, cracked, or severely corroded. This is critical for reliable electrical connections. Apply a small amount of dielectric grease to each terminal.
10. 10

    Position and mount the new fuse block
    Position the new fuse block in the mounting location, ensuring it is oriented correctly with circuit positions matching your documentation. Install the mounting screws finger-tight first to allow for minor adjustment, then tighten securely but do not overtighten as the mounting bracket may be phenolic or plastic.
11. 11

    Reconnect individual circuit wires
    Using your labels and photographs, reconnect each circuit wire to the correct terminal on the new fuse block. Push terminals on firmly until they click or seat completely. Gently tug each connection to verify it is secure. Double-check each connection against your documentation.
12. 12

    Reconnect the main power feed
    Reconnect the main power feed wire to the appropriate terminal on the new fuse block. Ensure the ring terminal is seated flat against the terminal post, install the retaining nut, and tighten securely with a wrench. This connection must be tight to prevent voltage drop and overheating.
13. 13

    Install fuses and perform initial testing
    Install each fuse in its correct position according to your documentation. Reconnect the battery negative cable. Using a test light or multimeter, verify that power is present at each fuse position when the ignition is in the appropriate position (run, accessory, or constant power). Test each circuit for proper operation before reinstalling trim panels.

Reassembly

1. Verify all circuits function correctly including lights, wipers, heater blower, horn, and accessories
2. Ensure no wires are pinched or stressed when reinstalling lower dash panels
3. Reinstall kick panel and any trim pieces removed during access work
4. Check that no rattles or loose panels exist after reassembly
5. Verify fuse box is securely mounted and does not move when touching wires

Verification

• Turn ignition to accessory position and test all accessory circuits including radio and heater blower
• Turn ignition to run position and verify instrument panel lights illuminate
• Test headlights, tail lights, brake lights, and turn signals for proper operation
• Start engine and verify charging system light functions correctly
• Check for any burning smell or unusual heat at the fuse block after 5 minutes of operation
• Verify all fuses remain properly seated after test driving the vehicle

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