battery dies every one to two days

Post by **precopster** » 01 Apr 2011, 20:54

Sorry to be a kill joy but you can't check current drain by going across positive and negative terminals, whether connected or disconnected.
You need to disconnect one terminal and complete the circuit with the Ammeter. Please be sure the ammeter is in the right range for current and that the ammeter lead terminals are plugged into the correct holes on the meter for current measurement.

Better method is to remove each fuse one by one and measure the current draw across the terminal of the fuse holder while the fuse is removed.

And it's a one man operation.

The fuse holder which flows the most current will contain the faulty circuit. Look for anything over 80mA with the ignition off.

Post by **jblackburn** » 01 Apr 2011, 22:37

Yes - complete the positive circuit with the meter in between. When disconnecting it, I always remove the negative cable first, then positive. Connect the meter in between, then replace the negative cable.

Might be two person since the fuses are still up front and the battery in the back of the newer models (I think).

Post by **precopster** » 01 Apr 2011, 23:39

If you leave the battery alone you can complete the circuit across the fuse holder with the meter with the fuse removed. This will give you a reading on each separate circuit.

Making it one man. This is what I tried to describe in the last post; albeit poorly.

jda2000 · Post by **jda2000** » 02 Apr 2011, 17:34

you mentioned the sunroof works intermittently, that's the failing electronic component leading you to the parasitic draw.

I bet the alarm siren module has failed, its battery leaked and damaged the circuit board. The sunroof uses the siren electric module to operate.

Replace the siren module and the problem draining the battery will be solved.

2ddorrance · Post by **2ddorrance** » 03 Aug 2011, 07:16

I think we have narrowed it down to the alarm system. How do I replace the alarm siren?
Thanks!

Post by **DGM** » 05 Aug 2011, 09:08

This forum contains plenty of information on this issue. Use the search engine.

Look at this tread;

https://www.matthewsvolvosite.com/forums ... =9&t=41126

2ddorrance · Post by **2ddorrance** » 05 Aug 2011, 14:27

Can this siren module be from a used car or does it have to be brand new?
Thanks!

Post by **DGM** » 05 Aug 2011, 14:41

The back-up battery of the siren module leaks an acid compound that ruins the electronic circuit board. These siren modules are good for about 7-8 years.

I would advise to replace it with a brand new one because of the work involved.

2ddorrance · Post by **2ddorrance** » 07 Aug 2011, 14:48

Does anyone have instructions on how to replace the siren module or where to buy it?
Thank you!

537playing · Post by **537playing** » 07 Aug 2011, 16:36

I bought my part from Tascaparts.com

battery dies every one to two days

Re: battery dies every one to two days