Part Number of LED Tail Light Bypass Flash Harness: C5HFHFitment of Bypass Flash Harness For Chevrolet Corvette Envy C5 1997 1998 1999 2000 2001 2002 2003 2004. This harness Does Not Work with the Euro Taillight . Please confirm car make model year and part number before purchase. Specification: Color: Black Material: Plastic, Metal Size: 9.5cm / 3.74" Pin Number: 7 Include 1x Tail Light Bypass Flash Harness Function of LED Bypass Flash Harness Help to eliminate the flash effect on the blinkers after installing LEDS. Help to fix the super flash or fast flash which caused by led taillight or running light, no need to using extra over load resistors on turn signal light. Features of LED Bypass Flash Harness Come with TPA (Terminal Position Assurance) Connectors, ensure each terminals can be firmly locked in. With LED bypass harness relay to ensure well performance to ensure work smoothly. This is a non-OEM product, accessory only! Instructions of Flash Harness Tools: T-10x4 Torxdriver, Small Flat Screwdriver Take out Fog lamp/Trunk release button and screws which located behind the plate. Loose the two screws which fixed the knee pad under the dashboard Reomve the Interior Air Temp Sensor cover plate and unplug the electrical connector then loose its screws.(skip this if there have no IATS) Remove the dashboard knee pad, and unplug the original harness then plug the FLASH bypass harness. Please search online video to get professional installation method.