parasitic battery drain in 2002 s60

chadschmidt17 · Post by **chadschmidt17** » 08 May 2013, 18:45

i have a 2002 s60 awd and the battery has been draining, it only takes about a day for the battery to go dead. i have been trying to trouble shoot the problem by pulling fuses and checking which ones (when out) will stop the battery drain. i noticed that when i have fuse #'s 27,28 and 32 out that it will stop draining the battery, # 27 is for the "front door modules". # 28 is for "roof lamps, courtesy lamps, UEM garage door opener". # 32 is for "central electronic module:-ECPS-courtesy lamps-glove box lamp". I'm wondering why i have to have ALL three out at the same time to stop the battery drain. 2 of the fuses are for courtesy lamps but the other is for the front door module which seems to be unrelated to the courtesy lamps. i would really appreciate it if some had any idea about what is going on and how to fix it. thanks

Post by **JDS60R** » 08 May 2013, 20:12

Time to identify the parasitic draw. Use your meter and conduct the test to narrow down which fuse it actually is. Then narrow it further down. I think others will chime in on how the CEM needs to see the other modules shut down before it will.

Post by **JRL** » 08 May 2013, 20:17

Always the butler (err glovebox light)

volvodoc · Post by **volvodoc** » 11 May 2013, 07:16

You very well may have a bad door latch not shutting off int lights intermit this was a common prob the draw would have to be large to take down batt over night try open and closing each door and watch int light also a dealer can read alarm causes to determine what door is causing problem also a failing siren control can trip alarm and just flash lights good luck

chadschmidt17 · Post by **chadschmidt17** » 13 May 2013, 13:55

ok, thank you so much for the help.

Post by **cn90** » 25 Apr 2024, 16:58

I have a genetic battery drain question...
Connected vs disconnected...

Let's say you don't use the car for 2-3 weeks (airport parking or at home not used for 2-3 weeks).

What is the discharge rate with:

- Battery connected?
- Battery ground cable disconnected?

Has anyone done this experiment?

Post by **jonesg** » 26 Apr 2024, 13:07

chadschmidt17 wrote: ↑08 May 2013, 18:45 i have a 2002 s60 awd and the battery has been draining, it only takes about a day for the battery to go dead. i have been trying to trouble shoot the problem by pulling fuses and checking which ones (when out) will stop the battery drain. i noticed that when i have fuse #'s 27,28 and 32 out that it will stop draining the battery, # 27 is for the "front door modules". # 28 is for "roof lamps, courtesy lamps, UEM garage door opener". # 32 is for "central electronic module:-ECPS-courtesy lamps-glove box lamp". I'm wondering why i have to have ALL three out at the same time to stop the battery drain. 2 of the fuses are for courtesy lamps but the other is for the front door module which seems to be unrelated to the courtesy lamps. i would really appreciate it if some had any idea about what is going on and how to fix it. thanks

how old is the battery ?
did you allow enough time for the system to completely go to sleep,
A bad (unstable) battery could keep the ecm from shutting down modules.
Its a simple test to leave a battery charger on as you monitor the system to see it if shuts everything down.
Monitor one of the suspect fuses, don't engage the alarm , roll window down and close the door.

see this.

02V70 · Post by **02V70** » 01 May 2024, 16:34

This video shows how to do the parasitic draw test by measuring fuses. It is faster and more accurate than pulling fuses one by one since pulling and putting a fuse back in can "wake up" some components.

I also have a weird drain that subsides when I remove the front door modules fuse. (removing left and/or right door module doesn't change it)