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1984-1987 Corvette C4 ACDelco Headlight Actuator Isolation Electric Relay

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Brand Logo ACDelco
Part #: 618-649
Availability: Currently Unavailable - Most out of stock items are available to ship within 7-10 days.
Fits Years:
  • 1984-1987
Prop 65
  • Description

1984-1987 C4 ACDelco Headlight Actuator Isolation Electric Relay

This relay acts as the sensor to make sure your Corvette's headlight motors shut off when they have reached the maximum rotation in either the up or down position when the headlights are turned on or off. Located on the left hand front side of the fenderwell, in front of the wheel under a black cover next to the vacuum bottle, this relay is essential for proper headlight motor functionality.

There are three headlight door relays: one left side relay (bottom), one right side relay (middle), and this single isolation relay (top). This relay is often overlooked when replacing the two headlight actuator relays. We highly recommend replacing all three at the same time and cleaning the old anti-corrosion compound out of the connectors and replacing it prior to plugging the connectors into the new relays.

  • Fits 1984-1987 Corvettes
  • Fits Top Position
  •  Located in Cover Next to the Vacuum Bottle in LH Front Wheel Housing
  • Highly Recommended to Change both Headlight Actuator Relays at the Same Time
  • Direct Replacement

Also known under these part numbers:

  • 033086023090
  • 036666154108
  • 152386
  • 33794
  • R675 BWI