Battery Drianing But not from the Seats..
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Joined: May 2009
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From: San Diego, CA
2002 C32 AMG
Battery Drianing But not from the Seats..
So I have been having this problem where my battery keeps draining even thought I unplug the seats(was thinking it was a power seat controller). Is there anyway I can check where its comming from?
Are there anyother places that might be a sorce?
P.S I have a 2002 C32
Thanks again
Are there anyother places that might be a sorce?
P.S I have a 2002 C32
Thanks again
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From: OC
C32
You will need to put an ammeter in between you battery and the positive terminal (remove positive terminal). You can then measure the current draw. Then start pulling fuses and unplugging things until a big chunk of the amperage goes away. Do not try to start your car with the meter in place.
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From: East Bay, Bay Area
2002 C32, 2012 S550
You will need to put an ammeter in between you battery and the positive terminal (remove positive terminal). You can then measure the current draw. Then start pulling fuses and unplugging things until a big chunk of the amperage goes away. Do not try to start your car with the meter in place.
Good luck!
Thread Starter
Senior Member
Joined: May 2009
Posts: 362
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From: San Diego, CA
2002 C32 AMG
You will need to put an ammeter in between you battery and the positive terminal (remove positive terminal). You can then measure the current draw. Then start pulling fuses and unplugging things until a big chunk of the amperage goes away. Do not try to start your car with the meter in place.
Ok so I dissconnect the battery from the + side and connect my meter to one side + battery and the other gose to the + cable for the car?
Sorry you kinda lost me.
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From: San Diego, CA
2002 C32 AMG
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From: OC
C32
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From: East Bay, Bay Area
2002 C32, 2012 S550
e.g. The first time I had the battery drain problem, we hooked up the ammeter, then pulled the fuse for the passenger seat control module. Then the battery draw dropped to a negligible draw, so I knew it was that seat module that was bad.
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02 C32 AMG
recently, my car has been "struggling" a little to start. seems to take a little longer than usual to turn over as there has been a noticeable lag in this process. is this the sign of a battery drain problem? or perhaps the starter is going?
also, what is the normal battery voltage? i think my gauge was reading somewhere between 12.4 (while at idle) and 13 or so while driving.
Also, just parked my car. Came back five minutes later, put the key to the position just before turning the car on. Battery voltage reading between 12.1-12.4. Ugh.....starting to worry about my car. I already have my idler pulley bearing (or both of them going out). Thank god it is going in the shop on Thursday for an overhaul
also, what is the normal battery voltage? i think my gauge was reading somewhere between 12.4 (while at idle) and 13 or so while driving.
Also, just parked my car. Came back five minutes later, put the key to the position just before turning the car on. Battery voltage reading between 12.1-12.4. Ugh.....starting to worry about my car. I already have my idler pulley bearing (or both of them going out). Thank god it is going in the shop on Thursday for an overhaul
Last edited by jturkel; Oct 6, 2009 at 02:41 AM.
MBWorld Fanatic!
Joined: Jul 2007
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From: East Bay, Bay Area
2002 C32, 2012 S550
recently, my car has been "struggling" a little to start. seems to take a little longer than usual to turn over as there has been a noticeable lag in this process. is this the sign of a battery drain problem? or perhaps the starter is going?
also, what is the normal battery voltage? i think my gauge was reading somewhere between 12.4 (while at idle) and 13 or so while driving.
Also, just parked my car. Came back five minutes later, put the key to the position just before turning the car on. Battery voltage reading between 12.1-12.4. Ugh.....starting to worry about my car. I already have my idler pulley bearing (or both of them going out). Thank god it is going in the shop on Thursday for an overhaul
also, what is the normal battery voltage? i think my gauge was reading somewhere between 12.4 (while at idle) and 13 or so while driving.
Also, just parked my car. Came back five minutes later, put the key to the position just before turning the car on. Battery voltage reading between 12.1-12.4. Ugh.....starting to worry about my car. I already have my idler pulley bearing (or both of them going out). Thank god it is going in the shop on Thursday for an overhaul
This is exactly what happened to me when my CPS(Crank Position Sensor) went out. It would turn over more than usual before it started. Then it got progressively worse. Wouldn't start until the car cooled down, so I got it replaced ASAP. Luckily my mechanic keeps one in stock at all times since they go bad so often.
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02 C32 AMG
Hey Josh,
This is exactly what happened to me when my CPS(Crank Position Sensor) went out. It would turn over more than usual before it started. Then it got progressively worse. Wouldn't start until the car cooled down, so I got it replaced ASAP. Luckily my mechanic keeps one in stock at all times since they go bad so often.
This is exactly what happened to me when my CPS(Crank Position Sensor) went out. It would turn over more than usual before it started. Then it got progressively worse. Wouldn't start until the car cooled down, so I got it replaced ASAP. Luckily my mechanic keeps one in stock at all times since they go bad so often.
you dont think this can be pulley related do you? oddly enough, like the day after i noticed my idler pulley/bearings going, the car has been struggling more and more to start up.
and for the crank position sensor, is there a code it should throw? i have a reader. i did some research and while i havent replaced mine yet (and i'm at 86K or so)....but it doesnt seem like i have symptoms i think..?.....doesnt feel like the car wants to stall out at a red light or suddently shut off. feels strong while driving minus the bearing/pulley issue.
edit.....voltage now down to 11.7-11.9
anyone know what the voltage is suppposed to be at when the car is sitting and key is in position just before motor turns on?
Last edited by jturkel; Oct 6, 2009 at 03:04 AM.
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From: Maine
Not an AMG :(
crap. i havent replaced mine yet. just checked battery voltage and it is now down to between 11.9-12.1 range. i'm thinking about unplugging the battery just in case it is a battery current draw. i dont have an ammeter. think i should unplug the battery just in case? doing so shouldnt erase my tune and could help me save my battery if it is battery related.
you dont think this can be pulley related do you? oddly enough, like the day after i noticed my idler pulley/bearings going, the car has been struggling more and more to start up.
and for the crank position sensor, is there a code it should throw? i have a reader. i did some research and while i havent replaced mine yet (and i'm at 86K or so)....but it doesnt seem like i have symptoms i think..?.....doesnt feel like the car wants to stall out at a red light or suddently shut off. feels strong while driving minus the bearing/pulley issue.
edit.....voltage now down to 11.7-11.9
anyone know what the voltage is suppposed to be at when the car is sitting and key is in position just before motor turns on?
you dont think this can be pulley related do you? oddly enough, like the day after i noticed my idler pulley/bearings going, the car has been struggling more and more to start up.
and for the crank position sensor, is there a code it should throw? i have a reader. i did some research and while i havent replaced mine yet (and i'm at 86K or so)....but it doesnt seem like i have symptoms i think..?.....doesnt feel like the car wants to stall out at a red light or suddently shut off. feels strong while driving minus the bearing/pulley issue.
edit.....voltage now down to 11.7-11.9
anyone know what the voltage is suppposed to be at when the car is sitting and key is in position just before motor turns on?
Y'all with 185mm overdrive pulleys: what is the output from your alternators?
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02 C32 AMG
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From: San Diego, CA
2002 C32 AMG
I unpluged the #9 and #3 Fuze which are for the overhead console and still the battery died I dont know what it is I cant hear anything thats making any noise eather. Its really getting on my nerves now.
I did this and it shows 0 I dont see any power being used..
Here is a pictures of what i did.
I did this and it shows 0 I dont see any power being used..
Here is a pictures of what i did.
Last edited by doom239; Oct 7, 2009 at 02:00 AM.
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From: Southern Cali (Ontario)
disconnect your batter (ground terminal) every night.. until you find the problem.
I made this a nightly routine.. until I unplugged the over head console.... problem was gone.
I made this a nightly routine.. until I unplugged the over head console.... problem was gone.
