Hi...newbie here with c70 conv.2000 reg.Have just changed the battery in the central locking fob and have lost central locking and immobilizer....anybody know what to do?

 

Similar thing happened to me when I replaced the plastic cover on my fob. I immediately took it apart again and realized when I took it apart originally, I failed to install it so the tiny components could come in contact with one another when the button was depressed. Try taking the whole thing apart (on top of a counter or table so you do not drop anything) and reassembling it together with that in mind. If you do not have any luck with that, you could try spraying a water displacing spray like WD-40 on the battery terminals. It is certainly possible that over time the battery terminals got a coating of corrosion, dirt, or dust after years of being placed in pockets and in miscellaneous places. Good luck with the fix!

 

Thanx

 

Also, remember that the key opening system has a battery too.