The only way to look inside is to cut it open, I doubt anyone would accept a return.
Buy a new one, make sure it is one that beeps on lock/unlock.
( look at above syfi post for part number )

 

Cheers for all your help on this guys didn't bother trying to change batteries after I'd opened it as the circuit board had been damaged but I did buy a second hand module from ebay and works perfectly also rather than having to to try to free the wiper blade arms off as they were rusted on I could actually get the module in and out nice and easily without touching them so very pleased and no more alarm going off thank you again a happy boy

 

How were you able to do that without removing the cowl?

 

I am a little curious about that too.

 

via arthroscopy I would think. Leaves only tiny scar to boot !

 

I undone the cowl and managed to lift the cowl and slide the module out so didn't need to undo the wiper arms

 

You ARE a clever little rascal, aren't you ?

 

Just thought it would be good advise for other users in same situation and it saves on buying a puller for the wiper arms

 

Decided to try replacing the alarm batteries and followed your PDF instructions to the letter. Thank you so very much for the step by step procedures and pictures couldn't have done it without them. My wife now has a working alarm system on her dream car and I learned quite a bit and took the time while I was at it to check the drain holes, make a grommet to fit around the driver side wiper and correctly position the wiper arms. Total cost $30. I've attached a couple of pictures of the batteries and board when I pulled them from the siren.

 

How did you repair that board?

 

I didn't think I could do it when I saw the board but decided to try and turned out to be fairly easy. Here are the steps I took.
1- Removed the old batteries.
2- Made a cleaning paste using baking soda and water (google it, there are many sites that describe the method) and did a first pass cleaning, that got most of the buildup off the board. Let the board dry overnight over 1 of the furnace hot air vent or you can use your oven set at 175 degrees.
3- Did a second pass cleaning using isopropyl alcohol.
4- Then sprayed the entire board with QD electronic cleaner and that was it. The solder mask is gone but the board comes out really clean.

I found the most difficult part of the job was removing the old solder and the old battery pins and soldering the new batteries in but it was worth the effort.

 

Great, let use know how well it holds up.

 

Have You taken any pictures of the Alarm board after the cleaning ? It would be interesting to evaluate the damage caused by the battery leakage . . .

Daniel

 

No Daniel I didn't. I only thought about it later. I couldn't wait to try it and got carried away I guess! I can tell you that I saw absolutely no damage at all caused by the leakage but the cleaning did remove the solder mask so I applied a bit of lacquer around the soldering points before installing the new batteries just to avoid any spillover. So far, I've had no problems at all with the siren going off for no reason and the system arms properly and seems to function as it was designed to. After doing this, I can tell you that the baking soda paste really does an awesome job at cleaning the circuit board and in my case anyway didn't have any negative effects. The only other thing I did was to install a 4-gauge ground cable from the bellhousing directly to the negative battery post as I'd seen it mentioned on this board a few times. If I ever open up the siren again, I'll make sure to take pictures. If you're thinking of doing it or if you have an old board, give it a try, you'll be surprised.

 

I might try it on the old original alarm just to see the result, but i do not intend to use this alarm anymore on my 2005 XF. This original alarm did not have the chirps feature . . . 3 for lock and 1 for unlock, like the one I have replaced it with, some Years ago .

Daniel

 

Give it a shot, I think you'll be impressed with the results. Here's a good link to get detailed information on the cleaning process Tips On How To Clean A Circuit Board Of Corrosion (sfxpcb.com) but there are other sites as well and they basically give the same information. My alarm does not have the CHIRP feature either and if it did, then it no longer works.