I THINK YOU NEED TO LOOK INTO THE ELECTRICAL SYSTEM OF THE CAR SOUNDS LIKE YOUR GETTING TO MUCH DRAW ON YOUR ALT BATTERY SET UP.LOOK BEHIND YOUR DRIVER COMPARTMENT OF YOUR CAR SEE IF YOU HAVE ANY GROUNDS LOOSE .GET A VOLT METER SEE IF YOUR GETTING 12 TO 14 VOLTS ON YOUR ALT ,BATT, AND YOUR RED CONSTANT POWER WIRE BEHIND THE DRIVER OR PASS SEAT. DO YOU HAVE A DULL ALT SET UP ON YOUR CAR? ALSO DO YOU HAVE DULL BATTERIES ON YOUR CAR? IF YES MABEY YOU NEED TO LOOK INTO A BIGGER ALT FOR YOUR CAR.TAKE YOUR TIME GOOD LUCK.