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exterior problem

Pop-up headlight motor failure

C4 and C5 Corvettes use electric motors to raise and lower the headlights. With age, the motors, their internal gears or bushings, and the control circuits wear out. A headlight may stay down, stay up, move slowly or move only on one side.

moderateModerate 1–3 hours (DIY) Community experience302 views

Source: Widely reported by owners. Not a GM statement. Confirm with a qualified technician.

When to stop driving

Don't drive at night if headlights won't come up. Raise them manually with the knob if you must drive after dark, and get them fixed soon.

Symptoms

  • One or both headlights won't rise or won't close
  • Headlights move slowly or unevenly
  • Grinding or clicking noise when the headlights move
  • Headlight 'winks' or moves on its own

Likely causes

  • Stripped gears inside the headlight motor
  • Worn pivot bushings causing the headlight to sag or bind
  • Failed motor
  • Relay, module or wiring problems

What to check

Diagnostic steps, in order. Stop if any step needs tools or skills you don't have.

  1. 1Check fuses and listen for the motor when you turn the headlights on.
  2. 2If the motor runs but the headlight doesn't move, the gears are likely stripped.
  3. 3If there's no sound, check for power at the motor connector with a test light or meter.
  4. 4Most C4 and C5 motors have a manual knob so you can raise or lower the headlight by hand. Turn it gently with the car off.
  5. 5Check the pivot bushings for play by gently moving the headlight housing.

Possible solutions

  • Install a gear repair kit or rebuild the motor
  • Replace the headlight motor
  • Replace worn pivot bushings
  • Repair relays, connectors or wiring

Parts commonly needed

  • Headlight motor or gear kit
  • Pivot bushings
  • Relay (as needed)

Warning signs

  • Uneven headlight movement
  • New noises from the headlight area
  • Headlights sitting slightly crooked

Prevention

  • Keep the pivots clean and lightly lubricated
  • Don't force a stuck headlight up or down by hand with the motor powered
  • Fix sagging bushings early to reduce strain on the motor
Information here combines factory data and owner experience and may not apply to your exact car. For brakes, steering, suspension, fuel or anything safety-critical, consult a qualified mechanic. Read the full disclaimer.

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