s-relay-h4-ground-

1 set- H4 H6054ST HEADLIGHT RELAY WIRING REVERSE POLARTY DESIGNED TO WORK WITH LED HEDLIGHTS AND HID KIT.IF YOU TRY TO CONNECT YOUR LED HEADLIGHTS AND IT DOES NOT WORK YOU WILL NEED TO DO THIS TEST IF YOUR CAR HAS 2 GROUND (-) 1 POSITIVE IT WILL REQUIRED THIS WIRING HARNESS TO PUT AFTER MARKET HID KIT OR LED (SMD) HEADLIGHTS. THIS RELAY WIRING WILL CONVERT: 2 WIRING GROUND (-POSITIVE) 1WIRE POWER (+) TO 2 POWERWIRE (+POSITIVE) 1 GROUND (-NEGATIVE). THIS WILL SOLVE ALL INSTALLATION ISSUES. This item will correct the problem for vehicles with 1 headlights or 2 headlights