Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: STUARTF on April 14, 2013, 09:11:17 AM

Title: Battery Drain
Post by: STUARTF on April 14, 2013, 09:11:17 AM

Morning has anyone had a problem with battery drain on a WJ. Ive had the starter,battery and alternator checked all ok. Leave it a few days and then need to jump start it. If I have to I will but an isolator switch on the battery but would really like to solve the hiccup. So if anyone has had an identical problem would really like to hear please :ecomcity:
Stuart

Title: Re: Battery Drain
Post by: Cockney Boy on April 14, 2013, 09:16:59 AM

What's the battery draining when standing still? If its drawing Anymore than 700ma then you've got something like a faulty radio/immobiliser or could be engine management related.

Get a multi meter and do an amps test before you do anything else. Also even tho the battery checked out you might want to try a different one

Title: Re: Battery Drain
Post by: Dutch on April 14, 2013, 09:25:04 AM

Interior light set/dim switch ?  one notch too high and it drains the whole show.

Title: Re: Battery Drain
Post by: STUARTF on April 14, 2013, 09:26:14 AM

Took the truck to a good garage who works on my cars (reputable) yday and he says battery (4 months old) alternator and starter A1.

Title: Re: Battery Drain
Post by: STUARTF on April 14, 2013, 09:27:26 AM

Nice one Dutch will try that tonight

Title: Re: Battery Drain
Post by: STUARTF on April 14, 2013, 10:12:15 AM

Battery Test information slip
VOLTS 12,26V
MEASURED 501A EN
RATING 5704 EN

STARTER 10.56V

CHARGING TEST 14.12V

Title: Re: Battery Drain
Post by: Cockney Boy on April 14, 2013, 01:27:02 PM

That's all great but what is the truck drawing when at rest? Report back please :)

Title: Re: Battery Drain
Post by: STUARTF on April 14, 2013, 01:28:59 PM

Will have to go back to garage for that figure !

Title: Re: Battery Drain
Post by: Cockney Boy on April 14, 2013, 03:12:14 PM

If you've got a multi meter then you can do it yourself :)

Title: Re: Battery Drain
Post by: bigjeepzj on April 14, 2013, 04:04:02 PM

 :iagree:
put an ammeter in series with the poss terminal of the battery and see what you get   

Title: Re: Battery Drain
Post by: STUARTF on April 14, 2013, 04:28:26 PM

Spanners and hammers yes, electrikery nowt.

Title: Re: Battery Drain
Post by: bluevanman on April 14, 2013, 10:21:34 PM

it could be the alternator diode it'll still show a charge. failing that check the silly stuff like glovebox/underbonnet light staying on you'll be amazed how many times they've been at fault.

Title: Re: Battery Drain
Post by: STUARTF on April 15, 2013, 08:19:38 AM

Hi BVM ive cheched all lighting and nothing on when car stationary. Cheers though.

Title: Re: Battery Drain
Post by: bgbazz on April 15, 2013, 08:28:07 AM

Just a thought..I had a similar problem a while ago. It turned out to be a cd changer, under the back seat, had been wired in wrong..radio could be turned off, but changer still had power going to it...flat battery after three days!!

Title: Re: Battery Drain
Post by: STUARTF on April 15, 2013, 11:57:29 AM

 :icon_redface: Dont have one of those :010:

Title: Re: Battery Drain
Post by: bgbazz on April 15, 2013, 12:10:24 PM

Ok..cross that idea off the list.

Title: Re: Battery Drain
Post by: daggie on April 15, 2013, 06:31:43 PM

had this with mine, twas the battery  :icon_winkle:
put a new battery on it, been fine ever since !
I still have the old battery here still got 12/13 volts still won't start the jeep,  :017: go figure  :jpshakehead:

Title: Re: Battery Drain
Post by: MOCAJ on April 15, 2013, 07:17:56 PM

its the current the battery will supply when loaded, volts at rest means nowt  :icon_winkle:

Title: Re: Battery Drain
Post by: daggie on April 15, 2013, 07:29:18 PM

I know that  :098:

but does stuart  :003: and his tester mate  :003:

Title: Re: Battery Drain
Post by: bluevanman on April 15, 2013, 09:44:33 PM

i'd get the battery "load tested" then if that's ok get a reading of the battery then reconnect the leads then take another next step remove the fuses one at a time till you find the faulty circuit

Title: Re: Battery Drain
Post by: Eclipsed4ever on April 15, 2013, 09:46:26 PM

My uncle had a very similar problem. Been looking for the problem for ages.

You could try pulling one fuse at a time until you narrow it down to the culprit. Time consuming but you'll get there in the end.

Title: Re: Battery Drain
Post by: bigjeepzj on April 15, 2013, 10:21:54 PM

a battery can get memory effect if your just doing short runs a then not using the car
the battery only remembers that it has a short charge capacity