Battery drain - Page 2 - PeachParts Mercedes-Benz Forum

jlw15 · #16 03-20-2012, 12:23 PM

when i'm checking each wire in block with meter do i leave the battery connected and put my meter on 10A and if i show a draw on a wire thats the problem??
thanks

JamesDean · #17 03-20-2012, 03:18 PM

You should disconnect the main positive battery cable from the battery. Then disconnect the wires from the block and put your meter between the positive post and the wire. It should be fairly visible where each wire goes. One or two should go to the starter, alternator and main car fusebox.

If you show a power drain on the alternator or starter wire set that might be indicative of a problem. If you find no drain on the starter or alternator wire sets thats a good sign that and your drain is elsewhere.

jlw15 · #18 03-20-2012, 06:13 PM

After pulling wires from block all were good except the one going directly to the fuse box that one was showing 0.09 on meter. Now What "LOL" i hope thats good news.---
I really do thank everyone for their help because i need it.

JamesDean · #19 03-21-2012, 10:07 AM

Well the next step is keeping the meter hooked to that wire alone and pulling each fuse one at a time until you see the number drop to zero. If you do that and see no change at all, perhaps unplug the anti-theft alarm unit I think its in the passenger footwell somewhere.

Mike D · #20 03-21-2012, 10:35 AM

Do you have the under hood light disconnected?

JamesDean · #21 03-21-2012, 11:37 AM

Quote:

Originally Posted by Mike D

Do you have the under hood light disconnected?

I don't believe any of these cars ever had under the hood lights... trunk yes but I dont recall engine compartment.

Mike D · #22 03-21-2012, 11:40 AM

Just checking. It wouldn't be the first time I've had something simple which I've overlooked drive me crazy.

Clemson88 · #23 03-21-2012, 12:57 PM

The battery drained every three days on a 71 300 series dodge van. I used it just on weekends or during times when my wife or I needed to transport all six kids of our children.

I traced it back to the cluster/steering area by following the drain from the battery one wire at a time. It turned out to be the emergency flasher mounted on the steering column. It was the old push button under the column type which has burnt out thereby not flashing when pushed.

Somehow, someone had pushed it into flash position. I pulled it back into off position and the problem was solved.

jlw15 · #24 03-21-2012, 01:12 PM

No hood light---your thinking the anti-theft alarm is inside the car passengder side kick panel on the side ??? pulled panel inside to the front seems to be the air bag and in the right kick panel could be it.---- but not sure how it disconnects---there is a rubber boot coming into the top of it--i don't want to break anything if that is the anti-theft your speaking of

JamesDean · #25 03-21-2012, 03:52 PM

Yes the anti-theft unit is located under the passenger kick panel. It has BECKER written on it:

jlw15 · #26 03-21-2012, 04:43 PM

OK mine looks just like that---where do i unplug it at??? several plugs

JamesDean · #27 03-21-2012, 04:58 PM

you probably don't need to unplug it, you can probably find its fuse:

It looks like Fuse 15, 6 and 8 supply it signals in one way or another. The main power seems to come from fuses in K position of the fuse & relay box:

jlw15 · #28 03-21-2012, 05:09 PM

Hate to be such a bother--- after looking again at fuses my car does not have a K i only have the 6 square ones behind it on your picture and the A, B and G and i have a double 3 even so its not numbered on mine

JamesDean · #29 03-21-2012, 05:23 PM

no bother at all. yes, those should be regular fuses in position k.

jlw15 · #30 03-21-2012, 07:45 PM

Pulled fuses from 15--6--8--and K postion and still meter is showing 0.09 on 10A setting--------Question----the rod that locks the gas cap door i don't have in place anymore that shouldn't cause a problem with it not being in place should it ??