Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: jeepmodel on April 02, 2015, 08:13:32 PM

Title: Battery Drain continued
Post by: jeepmodel on April 02, 2015, 08:13:32 PM: Hi everyone

I am still having battery drain issues with the S reg 4.0 litre cherokee I bought a month or two back. It's been in the garage and they can't seem to work out what the issue is. Alternator has been checked twice, fuses are identified and one of them is pulling 6.7amp but it serves a number of functions.

The current thought process is that the ECU could be at fault? any thoughts on this and if so any soloutions? I could try and buy an ECU from here or maybe from ebay but having called the dealers they werent very helpul in helping me identify which part it would need and didnt know if it would need any work to fit my vehicle.

Will any 1997 to 2001 ecu work or is it more specific than that? does anyone have one?

Also is there anyone in the Northeast with Jeep experience who you could recommend to help get this sorted as it is driving me nuts and I want to use the car rather than have it stood around lol :-)

I have thought about fitting a kill switch to just turn everything off however what bothers me is that the central locking etc wont work and it isnt really fixing the probelm. Has anyone else any ideas, contacts or ecu that could help me solve this??

Thanks
Title: Re: Battery Drain continued
Post by: gazjeep on April 02, 2015, 08:20:06 PM: ECU or PCM as our American cousins call them info here

http://www.birtydastards.com/frm/index.php?topic=26768.msg311075;topicseen#msg311075
Title: Re: Battery Drain continued
Post by: big g on April 02, 2015, 08:29:12 PM: My 98 zj has similar issues.

Doesn't like to be left for more than 48 hrs.

I just live with it and drop the battery connection if I know it's gonna be stood a while.

Pulling the iOD fuse also works but it's less aggro dropping the neg connection.

Not much help but ya not alone with this issue.

Long as I run it every couple of days it's fine.
Title: Re: Battery Drain continued
Post by: bigjeepzj on April 02, 2015, 09:09:43 PM: XJ's and ZJ's are a pain for flatting battery's have to disconnect my ZJ as it will drain the battery in 5 days
Title: Re: Battery Drain continued
Post by: Jonny Jeep on April 02, 2015, 10:38:00 PM: I wonder if unplugging the connectors from the PCM would drop the current drain...

And since you didn't get back in the last thread...
Can you have a look in the PDC for me and see if you have a 25A fuse in either fuse 18 or fuse 19 positions.
Title: Re: Battery Drain continued
Post by: Lornaben on April 03, 2015, 02:19:58 PM: I'm sure you have checked, but is the mercury switched light under the bonnet going out ....
Title: Re: Battery Drain continued
Post by: Dave69 on April 03, 2015, 05:37:22 PM: :imwitstupid:

light switches on with bonnet closed, goes off when opened. learnt that one fixed by just removing the bulb
Title: Re: Battery Drain continued
Post by: bigjeepzj on April 03, 2015, 06:14:44 PM: yep remover the bulb
Title: Re: Battery Drain continued
Post by: daggie on April 03, 2015, 06:25:35 PM: disconect the alarm siren, had this with 2 of ours, the nicad, batteries develop a short and kill the battery :icon_rolleyes: