Procedure for removing and replacing the factory radio/head unit in a 1966 Chevrolet Corvette, including proper dash panel access and antenna lead disconnection.

Warnings

Tools required

Parts

• Replacement radio/head unit × 1 — Aftermarket compatible with 1963-1967 Corvette dash opening or period-correct OEM
• Radio mounting bracket hardware kit (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake.
2. Disconnect negative battery cable from battery.
3. Allow interior to cool if vehicle has been in direct sunlight (to prevent burns from metal components).
4. Optionally apply masking tape to surrounding chrome trim to prevent scratching during removal.

Procedure

1. 1

   Remove radio control knobs
   Pull the radio control knobs (volume, tuning, and tone) straight off the radio shafts. These are friction-fit and should pull free with firm, even pressure. If stuck, gently work a flat-blade screwdriver behind the knob while pulling outward.
2. 2

   Remove radio knob retaining nuts and washers
   Using an appropriately sized nut wrench, remove the knurled retaining nuts securing the two concentric control shafts to the radio faceplate. There are 2 nuts total (one for each control shaft assembly). Remove the washers behind each nut and set aside for reinstallation. Remove the washers behind each nut and set aside for reinstallation.
3. 3

   Remove radio dial bezel
   Remove the chrome dial bezel that surrounds the radio face by carefully pulling it forward once the retaining nuts are removed. The bezel may have small tabs that engage the dash opening; work it free gently to avoid bending.
4. 4

   Remove radio mounting bracket fasteners
   Locate and remove the 2 Phillips screws securing the radio mounting bracket to the back of the instrument panel support. These screws are accessible from the front once the bezel is removed. Support the radio from behind to prevent it from falling.
5. 5

   Pull radio forward from dash
   Carefully pull the radio unit forward approximately 4-6 inches from the dash opening. Work slowly to avoid snagging wires or damaging the antenna cable. Use a flashlight to inspect the rear connections as you pull.
6. 6

   Disconnect antenna lead
   Locate the antenna cable connector at the rear right side of the radio. Unscrew the threaded antenna lead connector by turning counterclockwise, or pull the push-on connector straight off if equipped with that style. Note the routing for reinstallation.
7. 7

   Disconnect speaker wires
   Disconnect the speaker wire connectors from the rear of the radio. The factory setup typically uses bullet-style connectors or spade terminals. Note wire colors and positions: the factory mono radio typically uses a single speaker output circuit to the dash speaker. Mark connections with tape if necessary for identification during reinstallation.
8. 8

   Disconnect power supply wire
   Disconnect the power supply wire from the back of the radio. This is typically a single keyed connector or inline fuse holder with bullet connectors. The hot wire is typically a single power lead routed from the fuse block; the radio grounds through its mounting bracket to the chassis rather than via a separate ground wire.
9. 9

   Remove radio from vehicle
   With all connections disconnected, pull the radio completely free from the dash opening. Inspect the mounting bracket that remains on the radio to determine if it will be reused with the new unit or if a new bracket is required.
10. 10

    Prepare replacement radio
    If installing a period-correct replacement, transfer the mounting bracket from the old radio to the new unit using the existing hardware. If installing an aftermarket radio, ensure proper mounting bracket or conversion kit is attached per manufacturer instructions. Test-fit the new radio in the dash opening before connecting wires.
11. 11

    Connect wiring to new radio
    Connect the power supply wire first, then speaker wires, then antenna lead to the new radio. Ensure all connections are secure and match the notes or photos taken during disassembly. If using an aftermarket radio, connect the wiring harness adapter per manufacturer instructions.
12. 12

    Position radio in dash opening
    Carefully push the radio back into the dash opening while guiding wires to prevent pinching. Align the mounting bracket holes with the instrument panel support. Leave the unit slightly forward (about 1 inch) for final adjustment after testing.
13. 13

    Test radio function before final installation
    Reconnect the negative battery cable temporarily. Turn the ignition to accessory position and test radio power, speaker output, and tuning function. Verify antenna reception. If aftermarket radio, verify all features function correctly. Once confirmed, disconnect battery again.
14. 14

    Secure radio mounting bracket
    Push the radio fully into the dash opening and install the 2 Phillips mounting screws through the bracket into the instrument panel support. Tighten securely but do not overtighten, as the panel support is thin gauge steel.
15. 15

    Install bezel, washers, nuts, and knobs
    Install the chrome dial bezel over the radio face. Thread the washers and hex nuts onto the control shafts and tighten with a 7/16" wrench until snug (do not overtighten as this can crack the radio faceplate). Push the control knobs onto the shafts until they seat firmly.

Reassembly

1. Reconnect negative battery cable.
2. Test all radio functions including AM/FM reception (if applicable), volume control, tone control, and speaker output from both channels.
3. Verify that no dash lights have been affected by the radio installation.
4. Check that all trim pieces are secure and properly aligned.
5. Remove any masking tape applied for protection.

Verification

• Turn ignition to accessory position and verify radio powers on.
• Test all radio functions: tuning, volume, tone controls operate smoothly.
• Verify antenna reception by tuning to known strong local stations.
• Check for any rattles or loose mounting by gently pressing on radio face.
• Inspect all surrounding trim for proper fit and alignment.
• Verify no electrical issues by checking fuse panel and testing other accessories.

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