1. TEST PRODUCT TO VERIFY IT IS DEFECTIVE PROCEDURES TO DETERMINE IF A PRODUCT IS DEFECTIVE FLIP THE BULB AROUND: Some LED bulbs are polarity sensitive. If a bulb doesn't work the first time you plug it in, please flip the bulb or the bulb's connector 180 degrees in the socket. If it still doesn't work move to the next step.
TEST OUTSIDE OF the VEHICLE: It is sometimes helpful to test the product outside of the vehicle. Wires from a standard 12V battery or connecting the vehicle's battery can be attached to most products to verify operation. SWAP COMPONENTS SIDE TO SIDE: If the product is part of a pair and one side is still functioning, switch the suspected defective product to the fully operational side to see whether it can work or not.
2. Contact the customer service department for warranty Replacement, Please click here to contact us and at the Message part, please describe the item's issues, and order number for further assistance.