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04 escalade battery drain


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swerks 
Copper - Posts: 224
Copper spacespace
Joined: January 12, 2003
Location: Canada
Posted: July 25, 2007 at 4:43 PM / IP Logged  
i have recently completed a remote starter/alarm and nav install in an 04 escalade. the customers battery keeps going dead the dealership says rs like always. anyways gm tech says there is a 200 miliamp drain on the system(big deal)caused by the starter, removed starter still has draw(go figure)now tech says its gmos 04(please) removed gmos drain went down 60 ma.talked to metra tech support said gmos idle current should be between 70-150ma.here is what i do know upon customers 1st come back tested charging system alt was only putting out 13.5v and the cust was given a new batt 2 days prior(probally never properly charged)i have done hundreds of the 03-06 gm fullsize vehicles and am in my 14th year as a professional installer with a 1% comeback hisory, never had a problem anywhere close to this. any ideas this dealer is totaly trying to give my customer the gears. maybe cause his warranty is only 600km from being up.
this is the equipment used in the install
astrostart 2205
xpresskit xko01
pioneer avic d3
metra gmos 04
Steve Sverdahl
Swerksound Auto Electric
Red Deer Alberta
KarTuneMan 
Platinum - Posts: 7,056
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member consistently provides reliable informationspace
Joined: December 14, 2004
Location: Isle Of Man
Posted: July 25, 2007 at 9:07 PM / IP Logged  
It's rarely ever the remote start, or security system. How long does it take for the battery to "die"? When the right guy reads this post, he will tell you darn near EXACTLY how long it would take to kill the battery with this kind of puul coming off of it..... hang tight. PM  KPierson
KPierson 
Platinum - Posts: 3,527
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Joined: April 14, 2005
Location: Ohio, United States
Posted: July 26, 2007 at 5:35 AM / IP Logged  

A 200mA current draw IS a big deal when it comes to a car sitting.  It will kill the battery quickly.  A typical rule of thumb is the at rest current draw sould be under 50mA, but ideally should be lower then 35mA.

You can typically figure out how long a brand new battery will last by the reserve capacity of the vehicle.  Divide the reserve capacity by the actual idle current draw and then divide that number by 24 to give you 'days' before the battery will be too weak to start the car.

The idle current for the Metra piece is WAY too high at rest.

What I would do, is connect a current meter to the battery (through the ground lead) and measure the current yourself (with all lights off and nothing else on).  Then, start unplugging things one at a time until the current draw is less then 50mA.  If you find a 'smoking gun' replace that part and see if the current level stays down.

I would be somewhat concerned about the alternator only charging at 13.5 volts.  Run it down to an Autozone and they will check the charging system for free.

Good luck and keep us updated.

Kevin Pierson
Mad Scientists 
Silver - Posts: 380
Silver spacespace
Joined: February 07, 2004
Location: United States
Posted: July 26, 2007 at 6:36 AM / IP Logged  

Figure the battery is rated for 60 amp hours.. at 0.2 amps, it'll take 12 days for the battery to be dead. At 0.035 amps, it'll take 71 days.

I'll second KP about 0.035 amps being about all you want to see.. the 0.2 amps seemed high to me, but then car stereo stuff isn't what I do, so I wasn't going to say that the module was drawing too much cause I just don't know.

13.5v charging voltage when?.. At idle, with nothing on, I'd like to see 14v. As you turn on more accessories, voltage will drop (staying at idle) until the alternator can't keep up and the battery starts discharging. GM has released a TSB concerning that; extended idling and low speed driving with lots of accessories on will cause the battery to go dead.

The parts store might be able to check it.. depends on who does it. I really don't trust them much. The last alternator I had tested outputted, according to them, 140A. That it was a 90A VW alternator, and that they wired the alternator up with 14g wire, told me all I needed to know about them.

Jim

Velocity Motors 
Moderator - Posts: 12,488
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Fabrication. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 08, 2002
Location: Manitoba, Canada
Posted: July 26, 2007 at 11:21 AM / IP Logged  
Cjecj to make sure that the rear climate control is not drawing powering when vehicle is off. Had this problem with another vehicle and it ended up being the rear climate control circuit that was the culprit.
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
swerks 
Copper - Posts: 224
Copper spacespace
Joined: January 12, 2003
Location: Canada
Posted: July 26, 2007 at 12:59 PM / IP Logged  
this is the figure that metra tech support has given me for idle cuurent on the gmos 04
Steve Sverdahl
Swerksound Auto Electric
Red Deer Alberta
swerks 
Copper - Posts: 224
Copper spacespace
Joined: January 12, 2003
Location: Canada
Posted: July 26, 2007 at 1:03 PM / IP Logged  
the battery dies within 5 o 6 hours of turning the engine off it is a new battery given to cust by dealer, i imagine it was never fully charged like usual. also i performed a current draw test on my verhicle just to have some sort of reference and it draws 300milliamps at rest it is a 2005 ford escape that is stock with the exception of an astrosart 2205
Steve Sverdahl
Swerksound Auto Electric
Red Deer Alberta
swerks 
Copper - Posts: 224
Copper spacespace
Joined: January 12, 2003
Location: Canada
Posted: July 26, 2007 at 1:06 PM / IP Logged  
13.5 at idle and with no accessories on voltage drops when turning on accessories never over 13.7v
Steve Sverdahl
Swerksound Auto Electric
Red Deer Alberta
swerks 
Copper - Posts: 224
Copper spacespace
Joined: January 12, 2003
Location: Canada
Posted: July 26, 2007 at 1:09 PM / IP Logged  
13.5 at idle and with no accessories on voltage drops when turning on accessories never over 13.7v
do you know the tsb#?
Steve Sverdahl
Swerksound Auto Electric
Red Deer Alberta
KPierson 
Platinum - Posts: 3,527
Platinum spaceThis member consistently provides reliable informationspace
Joined: April 14, 2005
Location: Ohio, United States
Posted: July 26, 2007 at 1:42 PM / IP Logged  

300mA at idle?  Are you waiting for the dome light and other accessories to shut off?

For the battery to be dying only hours after it was running it would have to be a much more significant draw.

Can't you simply disconnect all the things you added and let the customer drive the vehicle for a few days.  If it is something you added the problem will go away, if it isn't something you added it will stay.  I know this isn't very scientific, but it is something the customer will understand.

Kevin Pierson
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