@zank bhai .. how old is your car is ..
i have seend this happens mostly to the CNG cultus .. however thank to Allah not happen to me yet ..
u need to put some relays then ur things will work fine .. like on head lights/ engine starter and CNG kit ...
do it fast and remember the replacement grips even from the 3S dealers is not of very fine quality however they claims its original ..
get your car checked ASAP ..