96 ZJ Parasitic Draw - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > 96 ZJ Parasitic Draw

Rough Country Jeep Suspension Deals at Rockridge 4WD!Engo winches available at www.rockridge4wd.com! Free shippRockridge 4WD IS Taking Zone Offroad Suspension Lift Kits

Reply
Unread 04-22-2012, 06:40 AM   #1
DeejayZeejay
Registered User
1994 ZJ 
 
Join Date: Mar 2012
Location: Macomb, Michigan
Posts: 325
96 ZJ Parasitic Draw

Well I have traced the draw from Fuse #7 to the white plug of the BCM. It draws .150 amps plugged in and then drops to .030 when unplugged. I have disconnected most of everything on this circuit with no change. Only things left are VTSS and parking brake switch. Anyone know what the VTSS looks like and where it is? Thanks for any input.

__________________
Jeeps 4 Life!
DeejayZeejay is offline   Reply With Quote
Unread 04-22-2012, 07:58 AM   #2
JS97ZJ
Registered User
1997 ZJ 
 
Join Date: Dec 2009
Location: Dingmans Ferry, PA
Posts: 2,035
Check the rear door ajar switch to see if it's in a shorted condition. In most of the cases, water is getting into the rear hatch through the wiper grommet and taking out the switch.
JS97ZJ is offline   Reply With Quote
Unread 04-22-2012, 10:44 AM   #3
MeanGreenZJ
Web Wheeler
 
Join Date: Apr 2011
Location: Mean Street in a desperate part of town
Posts: 1,710
VTSS is a function of the BCM.

TSB NO: 08-09-96
Battery - Discharges Within 5-6 Days When Not Driven

NO: 08-09-96

GROUP: Electrical

DATE: Mar. 29, 1996

SUBJECT:
Ignition Off Battery Drain

MODELS:
1996 (ZJ) Grand Cherokee
1996 (ZG) Grand Cherokee (export)

SYMPTOM/CONDITION:

Battery may be discharged if the vehicle is not driven for 5 to 6 days.

DIAGNOSIS/REPAIR:

This condition may be caused by a mis-communication between the Body Control Module and the Door Module which control the power windows and door locks. Normal ignition off draw is less than 25 milliamperes. This condition will prevent the Body Control Module from powering down which occurs approximately 30 seconds after the ignition switch is turned off. The Body Control Module draws approximately 180 milliamperes when it is in the normal operating mode.

If the condition is present, the vehicle will require installation of a revised Body Control Module. These can be obtained through your local Huntsville Authorized Repair Center. Refer to the Warranty Policies & Procedures manual for the locations of the repair centers. Be sure to state that the reason for the repair is "excessive ignition off draw caused by mis-communication between the Body Controller and the Door Module".

POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:

Labor Operation No: 08-19-02-99 0.3 Hrs.

FAILURE CODE: P8 - New Part
MeanGreenZJ is offline   Reply With Quote
Unread 04-23-2012, 05:47 AM   #4
DeejayZeejay
Registered User
1994 ZJ 
 
Join Date: Mar 2012
Location: Macomb, Michigan
Posts: 325
So what that TSB means is the BCM needs repair? Think I can swap one in from a junk yard?
__________________
Jeeps 4 Life!
DeejayZeejay is offline   Reply With Quote
Unread 04-23-2012, 09:11 AM   #5
merlot2twisty
Registered User
1997 ZJ 
 
Join Date: Nov 2008
Location: CensorNazi, Ohio
Posts: 143
Nope. I bought a BCM from a junkyard and it was locked out. It acted like the alarm had been triggered and I could not get it to allow the jeep to run.

Turns out my problem was not my BCM, and the junkyard refused to let me returnit.
__________________
We're going off-grid and moving to Texas! -- http://www.theratracelosers.com/
Check out our YouTube Channel! http://youtube.com/user/theratracelosers/
merlot2twisty is offline   Reply With Quote
Unread 04-23-2012, 05:19 PM   #6
DeejayZeejay
Registered User
1994 ZJ 
 
Join Date: Mar 2012
Location: Macomb, Michigan
Posts: 325
What was your problem? Im kinda stumped on this damn jeep....
__________________
Jeeps 4 Life!
DeejayZeejay is offline   Reply With Quote
Unread 04-23-2012, 06:07 PM   #7
MeanGreenZJ
Web Wheeler
 
Join Date: Apr 2011
Location: Mean Street in a desperate part of town
Posts: 1,710
I have swapped BCM's without any issue other then the mileage being off. Just make sure that the year is correct (96 only fits 96) and that if your jeep has no factory alarm that the replacement has no alarm as well. If you do have a factory alarm its okay to get a BCM from a jeep with no alarm.
MeanGreenZJ is offline   Reply With Quote
Unread 04-24-2012, 09:39 AM   #8
DeejayZeejay
Registered User
1994 ZJ 
 
Join Date: Mar 2012
Location: Macomb, Michigan
Posts: 325
Found the problem! Ended up being the seatbelt wire....keeping the bcm up. I tore this whole jeep apart to find it was just the seatbelt....
__________________
Jeeps 4 Life!
DeejayZeejay is offline   Reply With Quote
Unread 04-24-2012, 09:58 AM   #9
JS97ZJ
Registered User
1997 ZJ 
 
Join Date: Dec 2009
Location: Dingmans Ferry, PA
Posts: 2,035
Seat belts? Added to my list....

Where?
JS97ZJ is offline   Reply With Quote
Unread 04-24-2012, 05:18 PM   #10
DeejayZeejay
Registered User
1994 ZJ 
 
Join Date: Mar 2012
Location: Macomb, Michigan
Posts: 325
The drivers seat belt plug. Comes out by the center counsel and plugs into the bottom of the seatbelt...
__________________
Jeeps 4 Life!
DeejayZeejay is offline   Reply With Quote
Unread 05-01-2012, 06:11 AM   #11
DeejayZeejay
Registered User
1994 ZJ 
 
Join Date: Mar 2012
Location: Macomb, Michigan
Posts: 325
Well after thinking the parasitic draw was fixed by the seat belt switch, I was wrong. I was looking at the diagram wrong....fail. Thought I was reading for the white plug of the bcm, when actually I was reading the black plug. Little frustrated now and the idea of selling her Jeep is looking better and better. 190,000 miles on my gf's 96 4.0 ZJ. Well maintained with rebuilt trans and brand new tires. Whats a reasonable price to ask for? With this parasitic draw still occuring.
__________________
Jeeps 4 Life!
DeejayZeejay is offline   Reply With Quote
Unread 05-01-2012, 12:05 PM   #12
JS97ZJ
Registered User
1997 ZJ 
 
Join Date: Dec 2009
Location: Dingmans Ferry, PA
Posts: 2,035
If the hinges are bad the switches will not actuate causing the BCM not to shut down. The same goes for the rear hatch. You need to open up the rear panel to get at the rear hatch switch. Test it or disconnect it and see if the drain stops.
JS97ZJ is offline   Reply With Quote
Unread 05-01-2012, 04:35 PM   #13
DeejayZeejay
Registered User
1994 ZJ 
 
Join Date: Mar 2012
Location: Macomb, Michigan
Posts: 325
Switches all work. Tested all of them.....
__________________
Jeeps 4 Life!
DeejayZeejay is offline   Reply With Quote
Unread 05-02-2012, 12:50 PM   #14
JS97ZJ
Registered User
1997 ZJ 
 
Join Date: Dec 2009
Location: Dingmans Ferry, PA
Posts: 2,035
Are you using the FSM to troubleshoot this along with a meter?
JS97ZJ is offline   Reply With Quote
Unread 05-05-2012, 04:16 AM   #15
DeejayZeejay
Registered User
1994 ZJ 
 
Join Date: Mar 2012
Location: Macomb, Michigan
Posts: 325
No manual just wiring diagrams...
__________________
Jeeps 4 Life!
DeejayZeejay is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.