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1968-1982 Corvette C3 Headlight and Wiper Door Vacuum Relay Valve

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Brand Logo Mid America Motorworks Exclusive
Part #: 601-467
GM Part #: 5638427
Availability: In Stock - Ships today if ordered by 3 PM CT
Fits Years:
  • 1968-1982
Prop 65
  • Description
  • Technical Tip

1968-1982 C3 Headlight and Wiper Door Vacuum Relay Valve

Keeping your headlight and wiper doors in working condition is a must. This Vacuum Relay is the #1 cause of failures or improper operation of these systems. Replace your faulty units with our high quality reproduction Headlight & Wiper Door Vacuum Relay Valve. This valve has been reproduced to meet or exceed factory specifications and has been in production for over 20 years.

The Headlight Actuator Relay installs in between the headlight assemblies and controls the vacuum circuits to extend or retract the headlight actuator to open or close the headlights. This Vacuum Relay Valve serves the same purpose to control the operation of the 1968-1972 Windshield Wiper Door.

1968-1969 used one for the headlights in center of nose near hood.and one for wipers located on RH fender 1970-1972 used 2 for headlights and one on firewall or fender well for wiper door.

  • Fits 1968-1982 Corvettes
  • Sold Individually
  • Direct Replacement
  • Restores Proper Functionality
  • GM # 5638427


  • 1968-1969: 2 Required
  • 1970-1972: 3 Required
  • 1973-1982: 2 Required

Also known under these part numbers: (For reference only)

  • 25-123535-1
  • 30051
  • 5638427
  • 653151
  • 686420016311
  • A8258

When installing new Headlight Vacuum Relays, not that top and bottom hose ends must be located within .15 inch of the main body valve. Center hose end must be located within .6 inch of the main body valve for correct operations.