Hi everyone. I'm new to all this but have looked through the forums and can't find any answer to my car problem. The remote central locking was working fine but the battery holder came off. I sent my fob to someone on eBay who fixed the battery holder on and have assured me it works (infrared tested). I was using the key blade to unlock the cars central locking.I have tried several times to re-sync as per manual (key in ignition II and press lock) also tried unlock, both together,holding down,briefly pressing, but still not working. Also checked fuses and all ok. Does anyone have any ideas what this could be, is there a remote sensor, if so where is it. As a mum with twin babies remote locking is so helpful. Thanks all.