Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here! ZJ (93-98), WJ (99-04), WK (05+)
All ZJ/WJ/WK specific tech questions asked here!

4 Dead Batteries

Old 01-12-2019, 04:01 PM
  #1  
Junior Member
Thread Starter
 
Join Date: Dec 2010
Posts: 34
Model: Cherokee
Default 4 Dead Batteries

'97 Grand 4.0. Can't sit for more then a week before battery is dead. Sears and an independent garage all say "no drain found". HOWEVER, the current mechanic says, after 20 minutes on the tester (others only test for 10 seconds) , something happens and there is suddenly a small drain. They say, put in a kill switch vs. a long and expensive diagnosis w/expensive parts (BCM, computer...). I say, I wouldn't put a bandade on cancer - fix it!!! Been in the shop for a week. Anyone have continually dying batteries?
Snowbucks is offline  
Old 01-12-2019, 06:30 PM
  #2  
awg
Seasoned Member
 
Join Date: Mar 2016
Posts: 477
Year: 96
Model: Cherokee (XJ)
Engine: 4.0
Default

I pull each fuse, till the problem is (hopefully) isolated to one circuit

This could get expensive if ur paying shop time

I would do this myself, and fit an isolation switch in the meantime

current draw on a DVM should be <30ma, and not enough to make a test light glow
awg is offline  
Old 01-12-2019, 06:37 PM
  #3  
CF Veteran
 
Turbo X_J's Avatar
 
Join Date: Sep 2009
Location: ☼ Blackhole Sun
Posts: 8,567
Year: My Jeep is a GMC
Default

Bah

Turbo X_J is offline  
Old 01-14-2019, 08:57 AM
  #4  
Newbie
 
Join Date: Jan 2019
Location: vermont
Posts: 5
Year: 1997
Model: Grand Cherokee (ZJ)
Engine: 5.2
Default

this is common on jeep zj's if you pull the 50 amp fuse out of the power dist. box i think it is marked aux trail tow you will have no dash lights but most times prob will be fixed. is anything not working like door locks mine was the door lock in the rear hatch unplugged it and stopped the battery drain it is most times something in rear hatch wiper motor door lock etc. if they are not working the bcm will not go in sleep mode and it drains batt
zj rider is offline  
Old 02-05-2019, 11:10 AM
  #5  
Junior Member
Thread Starter
 
Join Date: Dec 2010
Posts: 34
Model: Cherokee
Thumbs up THAT was RIGHT ON!!!

Originally Posted by zj rider View Post
... it is most times something in rear hatch wiper motor door lock etc. if they are not working the bcm will not go in sleep mode and it drains batt
THAT WAS IT!!! A faulty cut-off switch in the rear hatch (disables the wiper if the window is open) was stopping the BCM from going to sleep...a very small slow drain, but would kill a parked (for 2 weeks) battery. No previous mechanic found it because it had to be hooked up to the meter for 20 minutes for it to trigger, and they would just hook & look, so saw nothing!!!
Snowbucks is offline  
Old 02-13-2019, 11:55 AM
  #6  
CF Veteran
 
Join Date: Nov 2015
Location: syracuse ny
Posts: 1,599
Year: 1997
Model: Grand Cherokee
Engine: 4.0
Default

Went around with this myself few years back. Yes the hatch open switch will do it, there are also the key switches. Mine was both key switches on the front doors, drivers went first. They are also different right and left and marked on the back with R or L. I had an ammeter set up to watch it go to sleep and could see the 40or so mA drain (I forget how much it was but way too much, when it was fixed you could watch it cycle down to 14 mA after a minute or so.) Also the alarm would not set, the red light wouldn't flash, and the interior lights would stay on. I called a dealer service guy was nice enough to say they had lots of problems with the door switches. They stick in the open position and the bcm thinks the car is being unlocked. Tested it and sure enough. Junk yard had tons of them and switched it out. Been fine since alarm sets every time. Changed both front door switches and hot wired the back hatch switch rather than mess with it.
97grand4.0 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
xj4fun
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
26
05-28-2014 03:56 PM
DEOR
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
10
09-08-2011 06:37 PM
scott357
Cherokee Chat
7
09-01-2010 11:24 AM
jeepopie
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
0
09-02-2009 10:27 AM
Stillwater Outfitters XJ
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
10
02-17-2009 12:22 AM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Quick Reply: 4 Dead Batteries


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description: