Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WJ > Troubleshooting/Problems

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #13  
Old 05-30-2012, 09:40 PM
Member
My Jeep: 2004 4.7 HO WJ
 
Join Date: May 2012
Location: Easton, PA
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 943
B!ll is on a distinguished road
Re: power draw on 2004 grand cherokee limited

Was this power draw ever resolved? I added a new radio to my Jeep after my factory head unit died... and it killed my batt 2x overnight. Now into a new batt, a new power meter (i know only enough to be DANGEROUS) and am afraid to connect my negative lead until I get some more answers. Disonnected wiring harness on amp, head unit, steering wheel control translater thingie and still have a draw.

Backstory: Every time I have an issue with my WJ, it seems to be two things that happen at exactly the same time which confuses the %#@^#$ out of me. Example: Generic transmission fault code and non-functional keyfob / alarm / remote locks at same time. No answer on the Tranny as yet but the keyfob thing was just a bad batt in the fob. I was fearing all kinds of electrical drama.

Anyway.... @ratherBfishin1.... what happened? I'm new here, perhaps I should start a thread.....
__________________

__________________
Reply With Quote
  #14  
Old 05-31-2012, 06:32 AM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 5,296
Thanks: 9
Thanked 130 Times in 123 Posts
Rep Power: 526342
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: power draw on 2004 grand cherokee limited

Welcome to the garage.
How much is the power draw with the ignition in off? And before installing the new head unit you never had any problem with a dead battery?
Regarding the generic tranny code, you need a scanner to pull the fault code(s) from the TCM.
__________________

__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #15  
Old 05-31-2012, 08:39 PM
Member
My Jeep: 2004 4.7 HO WJ
 
Join Date: May 2012
Location: Easton, PA
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 943
B!ll is on a distinguished road
Re: power draw on 2004 grand cherokee limited

Let's put the tranny issues aside as I am mostly concerned with the batt situation right meow. This was a newer batt (1 year?), Interstate Brand. No real issues prior, hence learning much now. Batt died overnight after install on head unit. Recharged, dies again within a day and sat dead for a week = new batt. My reading on the meter, static, with all manner of radio removed (all harness removed from head unit, OEM amp, etx) is now the same as when it is all plugged-in. Between .6 and .3 Amps. Not sure what's drawing half an Amp but this was after the car was recently run. So... method was disconnecting negative lead, turning off interior lights (using the dimmer roller on blinker stick only), all fuses and relays in-place. I clamped my black test lead to the batt terminal stud and touched the red to the disconnected batt lead. .6 to .3ish. Is this enough to kill my new batt? I have little $ and don't want to kill a brand new batt. Can anyone recommend a plan of action to see what's going on? I have 'fear' of the unknown. Thanks so much for anything anyone can recommend!
B!ll
__________________
Reply With Quote
  #16  
Old 05-31-2012, 09:24 PM
Member
My Jeep: 1999 4.7L WJ
 
Join Date: May 2011
Location: Sunny Colorado
Posts: 21
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1774
bacernate has a reputation beyond reputebacernate has a reputation beyond reputebacernate has a reputation beyond reputebacernate has a reputation beyond reputebacernate has a reputation beyond reputebacernate has a reputation beyond reputebacernate has a reputation beyond reputebacernate has a reputation beyond reputebacernate has a reputation beyond reputebacernate has a reputation beyond reputebacernate has a reputation beyond repute
Re: power draw on 2004 grand cherokee limited

Anything .25 or less is desireable. Remember that you have to let the meter sit for an extended period of time for all the modules to time out. Could be upwards of an hour or more. If you only have .3 without letting it sit for a long time that's great. Remember to disconnect the under hood light also, as it will draw a little and keep the modules from timing out longer.
__________________
Reply With Quote
  #17  
Old 05-31-2012, 09:36 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 5,296
Thanks: 9
Thanked 130 Times in 123 Posts
Rep Power: 526342
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: power draw on 2004 grand cherokee limited

The so called IOD (ignition off draw) current should normally not be more then 35 mA or 0.035 A. Your 0.3-0.6A is too much. The low current is caused by the different memory functions of PCM, TCM, clock and some other stuff.
Here below follows a procedure which i found on internet to investigate the cause of the exessive draw (they mention 0.025 mA as a max, but the WJ manual calls for 0.035 mA). Eventhough the current draw can deplete the energy of your battery, it should not kill it. The only thing is to recharge as soon as possible an empty battery, otherwise a chemical reaction between the plates and the liquid will damage the plates and reduce the capacity of the battery. Attached a page from the WJ manual with the normal IOD currents from several components :

IGNITION-OFF DRAW TEST
Ignition-Off Draw (IOD) refers to power being drained from the battery with the ignition switch in the Off position. A normal vehicle electrical system will draw from 5 to 25 milliamperes (0.005 - 0.025 ampere) with the ignition switch in the Off position, and all non-ignition controlled circuits in proper working order. The 25 milliamperes are needed to supply Powertrain Control Module (PCM) memory, digital clock memory, and electronically tuned radio memory.

A vehicle that has not been operated for approximately 20 days, may discharge the battery to an inadequate level. When a vehicle will not be used for 20 days or more (stored), remove the IOD fuse from the Power Distribution Center (PDC) This will reduce battery discharging.

Excessive IOD can be caused by:

Electrical items left on
Faulty or improperly adjusted switches
An internally shorted generator
Intermittent shorts in the wiring.
If the IOD is over 25 milliamperes, the problem must be found and corrected before replacing a battery. In most cases, the battery can be charged and returned to service.

DIAGNOSIS
CAUTION: Testing for high-amperage IOD must be performed first to prevent damage to most milliampere meters.

Verify that all electrical accessories are off. Turn off all lamps, remove the ignition key, and close all doors. If the vehicle is equipped with a illuminated entry system or electronically tuned radio, allow the electronic timer function of these systems to automatically shut off (time out) This may take up to three minutes.
Determine that the underhood lamp is operating properly, then disconnect the lamp or remove the bulb.
Disconnect the battery negative cable.
Connect a typical 12-volt test lamp (low-wattage bulb) between the disconnected battery negative cable clamp and the battery negative terminal post. Make sure that the doors remain closed so that the illuminated entry system is not activated. The test lamp may light brightly for up to three minutes, or may not light at all, depending upon the vehicle's electrical equipment. The term "brightly," as used throughout the following tests, implies the brightness of the test lamp will be the same as if it were connected across the battery. The test lamp must be securely clamped to the battery negative cable clamp and the battery negative terminal post. If the continuity between the battery negative terminal post and cable clamp is lost during any part of the IOD test, the electronic timer function will be activated and all tests must be repeated.
After three minutes, the test lamp should turn off or be dimly lit, depending upon the vehicle's electrical equipment. If the test lamp remains brightly lit, do not disconnect it. Remove each fuse or circuit breaker (Refer to Wiring Diagrams for more information) until the test lamp is either off, or dimly lit. This will isolate each circuit and identify the source of the high-amperage IOD. If the test lamp is still brightly lit after disconnecting each fuse and circuit breaker, disconnect the wiring harness from the generator. If the test lamp now turns off or is dimly lit, Refer to Charging System to diagnose the faulty charging system. Do not disconnect the test lamp. After the high-amperage IOD has been corrected, the low-amperage IOD may be checked. It is now safe to install a milliampere meter to check the low-amperage IOD.
With the test lamp still connected securely, clamp a milliampere meter between the battery negative terminal post and the negative cable clamp
CAUTION: Do not open any doors, or turn on any electrical accessories, with the test lamp disconnected or the milliampere meter may be damaged.

Disconnect the test lamp. Observe the milliampere meter. The current draw should not exceed 25 milliamperes (0.025 ampere) If the draw exceeds 25 milliamperes, isolate each circuit by removing the circuit breakers and fuses. The milliampere meter reading will drop when the source of the draw is disconnected. Repair this circuit as required, whether it is a wiring short, incorrect switch adjustment or a component failure.
Attached Files
File Type: pdf IOD test.pdf (56.5 KB, 15 views)
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #18  
Old 05-31-2012, 09:37 PM
Member
My Jeep: 2004 4.7 HO WJ
 
Join Date: May 2012
Location: Easton, PA
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 943
B!ll is on a distinguished road
Re: power draw on 2004 grand cherokee limited

So it is a good plan to do my test and then wait an hour or two without touching a thing (door handle included) and test again? Does the car go to sleep, etc when the batt is disconnected? I'd think that is sort of a forced sleep... no?
__________________
Reply With Quote
  #19  
Old 05-31-2012, 09:53 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 5,296
Thanks: 9
Thanked 130 Times in 123 Posts
Rep Power: 526342
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: power draw on 2004 grand cherokee limited

With the battery disconnected the jeep will be sleeping, but as soon as you connect the battery again, the internal lights will come on. According the page i had attached, only the TCM has a 20 minutes time delay before going into sleep mode, after switching the ignition in off.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #20  
Old 05-31-2012, 09:58 PM
Member
My Jeep: 2004 4.7 HO WJ
 
Join Date: May 2012
Location: Easton, PA
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 943
B!ll is on a distinguished road
Re: power draw on 2004 grand cherokee limited

Awesomesauce. Will give this a shot.

One other question... with fuses on the floor of the driver's area, how the &%*@ do I pull fuses without reactivating the car?
__________________
Reply With Quote
  #21  
Old 05-31-2012, 10:09 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 5,296
Thanks: 9
Thanked 130 Times in 123 Posts
Rep Power: 526342
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: power draw on 2004 grand cherokee limited

When you keep the door open for some minutes, the internal lights will be shut off by the BCM. Keep the door open and you should be ok.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #22  
Old 05-31-2012, 10:10 PM
Member
My Jeep: 2004 4.7 HO WJ
 
Join Date: May 2012
Location: Easton, PA
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 943
B!ll is on a distinguished road
Re: power draw on 2004 grand cherokee limited

Gotcha. Thanks very much, Frango!
__________________
Reply With Quote
  #23  
Old 06-03-2012, 02:09 PM
Member
 
Join Date: Nov 2011
Posts: 19
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1143
ratherBfishin1 is on a distinguished road
Re: power draw on 2004 grand cherokee limited

Quote:
Originally Posted by B!ll View Post
Was this power draw ever resolved? I added a new radio to my Jeep after my factory head unit died... and it killed my batt 2x overnight. Now into a new batt, a new power meter (i know only enough to be DANGEROUS) and am afraid to connect my negative lead until I get some more answers. Disonnected wiring harness on amp, head unit, steering wheel control translater thingie and still have a draw.

Backstory: Every time I have an issue with my WJ, it seems to be two things that happen at exactly the same time which confuses the %#@^#$ out of me. Example: Generic transmission fault code and non-functional keyfob / alarm / remote locks at same time. No answer on the Tranny as yet but the keyfob thing was just a bad batt in the fob. I was fearing all kinds of electrical drama.

Anyway.... @ratherBfishin1.... what happened? I'm new here, perhaps I should start a thread.....
I have a short in the system between the under hood fuse block and under dash fuse block. I gave up and installed a kill switch on the system to disconnect the battery.
__________________
Reply With Quote
  #24  
Old 06-07-2012, 03:34 AM
v8plus's Avatar
Member
My Jeep: 2004 4.7 HO WJ
 
Join Date: Apr 2012
Location: birmingham. uk.
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 991
v8plus is on a distinguished road
Re: power draw on 2004 grand cherokee limited

Very informative post Frango100. I have the same battery drain problem did not know about the 20 day rule.Is this a common fault on all jeeps or just the wj.I posted yesterday about fitting a c-tek battery opimiser but as of yet recieved no replies. Can you inform me of location to the iod so i can disconnect as and when needed to reduce drain on my battery.Thanks for your reply.
__________________

__________________
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Radio/Window Power Draw-Off tommc4 Troubleshooting/Problems 0 09-05-2011 06:49 AM
NEW AND IMPROVED 2004 grand cherokee limited with selec trac trans case slim Grand Cherokee - WJ 18 05-30-2011 01:10 PM
Some Ideas For 2004 Jeep Grand Cherokee Limited awhisperandaclamour Interior/Exterior/Visual 23 07-28-2009 10:19 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 08:19 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by Chrysler Group LLC.