Electrical Issue 2000 Volvo S80 T6 Need help

I have been asked to help diagnose an electrical issue with a customers car at a friends shop tomorow(he saves the weird problem cars for me)

The issue is that the battery goes dead after a couple of days. I know the drill on putting a meter between the battery and the ground and then pulling the fuse's until you find the offending circuit BUT in this case the car at rest is only drawing about .045 volts. I spoke with another person in the business and this is well with in the normal range for this car.

So now what? My suspicions is that it may be alarm related but any help in diagnosing this would be greatly appreciated.

Another possibility is that the battery is dying a slow death and it just can not hold a charge over that period of time but is fine if it is topped off by the alternator by running the car on a regular basis. I had a similar problem in my 924s several years back that finally was fixed by getting a new battery.

Is there another place I should be looking?

I have no real advice, I wish you the best, but don't envy you at all trying to hunt down an electrical gremlin on an S80. Dad had an '01 T6, I'm pretty sure even the floor mats were computer controlled.

matthewsvolvosite.com is the first place I'd start my search.

• Lee

My Focus did the same thing until we replaced the battery. I'd start with that.

If it goes dead in a set period of time, park it, disconnect the battery and see if it is dead when you hook it back up after that amount of time.

Also- it would be .045 amps, not volts. 40 milliamps is a pretty typical upper level for a draw.

It will take up to half an hour for all the modules to fall asleep too- it will probably have 3 or 4 steps down in its draw- probably 200 mA or more for a minute or two. Roll the window down, or open the door and close the latch, close the latch on the trunk and hood, and put the keys on the roof. Hook up the ammeter and wait.

Enjoy!

Alarm sirens are a common failure on those IIRC, disconnect it, then monitor to see if that resolves the issue.

Thanks everyone very helpfull stuff