Vw golf 1.6 petrol alarm system stopped working with key fob/run the battery down

USA car,not told and matters huge.(out side USA are different cars()
check fuses
scan the car, using OBD2 scan tool.
only have 1 key
only have 2 FOB
car came new with 2, lost second set< never have just 1.
does car have IMMO ?

The alarm system needs to be de-activated by turning the key to the unlock position at the drivers door lock cylinder when re-connecting the battery. The alarm control module cannot be disconnected otherwise the vehicle will not start.

change battery in key fob

just connect the terminals,and wait till the alarm stops(30secs)then UNLOCK/HOLD KEY OVER 30 secs,windows go down.then lock/hold key over,windows go up.then press remote unlock button for 30 secs,you have just reset the alarm system/central locking/window comfort facility.....has to be done EVERY time you disconnect battery........

Your best solution is to contact the main dealer and get the whole thing checked out .you could spend hours looking for the problem and never find it .

is a cheap alarm. change it wih a proper one.
both of you have alarms which is working on the same freqvency. the same alarm, or just weird coincidence.

If im not mistaken,your car should have an alarm reset/override.Below the steering column,on the dash should be a slot where you put your remote transmitter to deactivate the alarm.If that works,you then need to have your remote checked and coded by a vw dealer.Good luck.

Not to be a smart azz but have you replaced the battery yet in the fob?

If so then it could be a bad fob, reciever, power issue, etc...

the alarm itself could have an internal earth problem.... pull out fuse from alarm or disconnect alarm and see if fuse still blows

No problem. The key fob is two pieces. The key part and the remote. Open the key as you would to sue it. Where the key flips open you can see a small recess about where the line of the trunck switch. This is where the key separates. You can pull it off or pry it with a small screwdriver. Once separated with remote part in your hand this also splits in 2. In the same area you split the key off insert the screwdriver in this recess and the fob will open giving you access to the battery. Also can be done by hand. It is a little tight so you will have to force which is normal. No screws just clipped. Make sure the battery is positioned in the right way and that you have 3 volts when you test the battery. 2.7 volts will make the remote not work or act funny.