samson_420

iTrader: (1)

My car kills my battery slowly(over a week of sitting). So I got my multi meter, and checked all the fuses while looking at the amp draw.

This is what I found. When sitting with all fuses in, my draw is at 0.078 amps < this is what is killing my battery.

I started pulling fuses and this is what I got, the PCM draws 0.001 amp.
The fan circuit(with the fuse installed), draws 0.024 amps.
With both the PCM fuse and fan fuse pulled I still have a draw of 0.006 amps.

Now for the good ****. With the courtesy lamp fuse installed the total draw is about 0.078 amps. So this damn thing alone is pulling 0.047 amps. The lights are not on at all, I tried without my LED's installed and with regular bulbs. Same ****, well with the regular bulbs in the draw drops to 0.074.

I also checked my other car which never has any battery voltage issues. Its draw is about .030 amps.

WTF can I do? What can it be?

406malibu

drive more often

lol just messin, good luck, i hate electrical problems, a major weakness of mine.

DarkCloud

how old's your battery man?? .078 really isnt that bad. i have led's on in my car at all times, and my battery does fine.. its prolly just time for a new one...

samson_420

iTrader: (1)

2 Days old. . . . . . .


This ******* rots. . . .


What can it be in the circuit causing this?

samson_420

iTrader: (1)

A few hours of tracking different **** and I found that the BCM is responsible for 0.047 of the amps drawn.

This way too much to keep a battery alive.


Can anyone check their amperage draw? If you don't know how and have a multi meter, PM me.


I really need to get this fixed.

intense3123

In most cases .050 A is considered normal and is not enough to kill a battery. I don't think the BCM is the problem. Courtsey lights probably are. Are you sure the trunk switch is
working. Are you getting two honks when you lock the car with the remote and not just one? I had a problem with the trunk switch getting stuck on the carpet and not working properly.

samson_420

iTrader: (1)

Every thing is shutting off(I checked all the lights). When the BCM is hooked up, it draws almost at 0.09 amps. When I disconnect it, it drops to around 0.030.


I thought it could not be the BCM, but what else?

All the lights are off, everything else is working as it should. And this much of a drain kills my battery in about 3 months total.


And yes it honks twice, when I lock it with the remote.

dschmittie1

iTrader: (64)

how long are you letting it sit before you test your draw. most cars you need to wait 20 min for everything to power down. Also is your glove box light turning off??

KENS_SS_4

Please clarify
What does this mean?
You are buying a new battery every three months or
You are leaving the car parked for three months only to find battery charge completely gone

samson_420

iTrader: (1)

LOL . . .No, I don't let the car sit for 3 months at a time.

In about 3 months I have to get a new battery because the old will no longer take a charge. Like the last one I just pulled, it would not keep a charge passed 11.5 Volts.

All the lights are really turning off. But, the amp draw does not change over time. I let it sit for 5 minutes or an hour. I have tried both, I just the multimeter hooked up.

I really thought it is the BCM, but when I pull the Courtsey fuse the drop is gone. And this is when all the lights are already off.

Aslo this draw is no where near big enough to be a bulb on.

samson_420

iTrader: (1)

Here is more of what I found.

If I disconnect the battery then reconnect it, the amperage draw stays at about 0.032. Then if I open the door and the lights come on the amperage draw will not drop bellow 0.080 + even when all the lights turn off.

I still think it is the BCM. . . . . .

Update

Well, this is just odd as hell. . .

I unpulgged everything, then put it all back together. All the sudden it drops like it should. WTF? I did not do anything, now it goes to about .03 with all the interior LED's on, then it drops to .01 then .003. . It did not do this before. . . Man, diagnosing electrical problems is the worst. I can't figure some **** out like this.

Oh, well. . . I guess I will just watch the amperage draw and voltage on a regular basis.

99345hp

drive the car then the battery wont drain down.

samson_420

iTrader: (1)

^ Good one. . . . . . . . . .

99'CajunFirehawk157

iTrader: (57)

One word bro, DELTRAN. End of problem. If you don't know what it is, google it and get your self one if you car sits. Mine does, I have a red top and one of these, only way to go.

CULATR

iTrader: (96)

which battery tender you got chargin on your bird, the tender jr?

99'CajunFirehawk157

iTrader: (57)

No I bought the Tender Plus w/bag and extra 25 ft cable for $45 w/shipping off ebay, although I wish I would have gotten one with multiple leads. IE, you can charge more than one battery, I swap this unit over to my zero turn lawn mower during the winter and I foresee a 4 wheel atv sitting in my garage too...

wrencher

iTrader: (2)

50 milliamps is the max allowed. 30 is prefered.
When you test it make sure you give it at least 20-30 minutes to 'time out' & all the modules to completely shut down. Then confirm the draw.
Have seen BCM's in the past on various GM cars cause a draw. The courtsey circuit is key off power used for a lot of componets.

ultraz

iTrader: (4)

having similar problems....... subscribed.... I was thinking it was the BCM as well.

bene

iTrader: (16)

Subscribing as well. I have my wife start my car every other day to make sure the battery doesn't drain however one day she couldn't start the car because the battery went dead. The battery is brand new, red top OPTIMA. I will be reading this thread for sure.

samson_420

iTrader: (1)

I had another toppic going on here. But, this is what I found.

I thought it was the BCM. Tore it out along with my remote start module, the drain was gone. Plugged it back in, it was back. So I tried it a couple more times. . . And it stopped, no more drain(well, it still draws 0.03 Amps or so).

WTF? I am just going to disconnect my battery. . . ******* GM, WTF?


Battery Tender = Gay, my car is not a electric vehicle that needs to be charged.