My 1998 volvo 945 turbo drains the battery after being charged all night sitting at 12.7v as soon as I turn on either the ignition or the parking lights the battery drains quickly and within 30 seconds goes below 12v. I hate electricity and don't really have a clue to find the draw. The battery was replaced as I hoped the battery was at fault but it wasn't. I have pulled some fuzes but it didn't change the draw so I'm suspecting something concerning the lights or other electronics that start with both ignition and parking lights. Any help appreciated. I have already been stranded several times due to the battery going dead now
#battery drains instantly
crisp turtle
leaden tiger
Your trouble shooting method is already on the right track. Keep looking using that method. Disconnect, reconnect
If you have a dmm, that will be the best help. At that point you will be able to check for shorts, opened and closed relays, etc
crisp turtle
If you have a dmm, that will be the best help. At that point you will be able to...
Not sure what a dmm is but I found that in the rear left under the floor mat there was a hole so the rear wheel was just pouring in water on some connections. They were completely submerged. I removed the drain plug and have made an attempt at sealing the hole but that will get fixed better soon. I cleaned all connectors using breaklean and then lubing with wd40. There appears to be no corrosion in the connectors but I will try to find out what they do and try disconnecteibg them so see if that's the draw
leaden tiger
DMM—>Digital MultiMeter
crisp turtle
oh yeah i have two of those. right now i was out checking fuzes and kinda nailed it down to two fuzes but not really. both fuzes are for stuff like lamps and instrument cluster. so if i remove both the draw with the parking lights goes away pretty much but if i turn on the ignition without those fuzes its still drawing massive ammounts of power even with a 5A batterycharger trying to charge the battery it still drains from 12.6-11 within 60 seconds. so i guess im kind of back to square one :p
leaden tiger
Something is staying closed, allowing current flow. Time for more diagnosing lol
south nest
Thinking out loud - is it worth pulling all the fuses (making sure you have doco on what goes where) and then you can put them back one by one, testing for drain each time? That way, you'll find the circuit as soon as it's the last fuse you put in.
leaden tiger
Thinking out loud - is it worth pulling all the fuses (making sure you have doco...
You could definitely do this
Good start
crisp turtle
I saw this after I did a test with an amp meter. I checked every fuze and wrote down the amperage. I believe the highest was 5A and it was the headlights. In total I think it was 15 or 20A total draw with the ignition on. I will try pulling all fuzes tomorrow