if it's flashing (5) it means the fobs sending/syncing mode but of doors don't lock/unlock then it's not syncing fine to the car but could be trying and not sending strong enough signal or even trying and not sending a signal at all
has it worked previously ?
in the last 11 years changed batteries every time / remotes 20% of the time / control unit - never
i bought the car in the summer, central locking didnt work, thought it would just be the battery, changed the battery still didnt work. hav been trying to get it working since to no joy, even tried re-soldering the contacts in the remote.
this is the annoying and stupid bit, when closely examining the fob a couple weeks ago, i noticed a tiny diagram in the fob with 2 batteries and the separator. so i bought another battery and the light on the fob worked when i pressed buttons. so it has, in theory, 2 new batteries, though they are of slightly differing ages, have both had very little use so shouldnt hav run out.
also, when i hold a button down, it flashes, quickly but consitently. when the remote had just one battery in it flickered very weakly and inconsistently.
any suggestions?