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  #1  
Old 01-16-2014, 05:29 AM
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Battery Saga

I had a flat battery the other day in my GC.

It was a little more difficult to resolve than I anticipated, to say the least.
The vehicle was in my garage so I thought I would just put the battery on the charger - but I soon found out that the AGM batteries have special charger requirements. Sigh. No problem I will just reverse it out of the garage and jump start it. If only I could get the gear shifter into neutral - won't budge with a flat battery

No problem - the manual says to lift up the cup holders in the centre console and there is a little hole to an override switch to get into neutral. But there's nothing there - WTF? Thanks to this forum I eventually find that for export GC's there is another access hole on the right hand side of the centre console down besides the drivers seat. (Not mentioned anywhere in my owners manual)

Next issue - cannot unlock the steering wheel - not even after removing the start button and inserting the "key". Anyway, luckily the wheels are pretty straight so I push the car outside in neutral and steering wheel locked. Now I try to jumpstart from my little Hyundai Elantra and it won't start. The jumper leads were pretty thin, so I now borrow the heavy duty set from my neighbour. Still won't start!

Next I ring road side assist. They come and jump start it (I guess the Hyundai couldn't supply enough current). But now the engine warning light is on and radio won't power up. "Better take it to the dealer" says the road side assist guy.

Contrary to my previous experiences the dealer service was exceptional. They sorted it all out and even mounted my broken front ACC sensor and supplied the necessary missing screws, etc, all under warranty - without me even mentioning it! It was Albion CJD Brisbane by the way - (now I just hope they give me a good price for my upcoming service!)

Anyway, if anyone has bothered to continue reading this far into my blathering, my question is what is the starting current for the GC. i.e. what rating jumper leads do I need (in amps) and I guess from that I can also figure out whether a particular vehicle will be able to source that much current to give me a jump start if I need one?
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Old 01-16-2014, 07:59 AM
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Re: Battery Saga

You chose an interesting way to get those screws for your ACCC sensor.
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Old 01-17-2014, 12:13 AM
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Re: Battery Saga

Yep, Switchmode charger is the only way to go for your AGM. Get yourself a set of beefy jump leads, the budget skinny ones are OK to hang out the washing. I would have thought the Hyundai revved up with good cables would have given you a crank....I always hook up to the donor battery, rev the donor car, give it a few seconds (count to 10), especially if the battery is absolutely flat, then give it a crank. Not sure of the CCA of our AGM's. Should be on a label on the battery. I will take a look next chance I get. At least you are up and running.
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Old 01-17-2014, 05:26 AM
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Re: Battery Saga

Yeah I thought the Hyundai would have been able to do it.
We gave it a really good rev, but the Jeep wouldn't even turn over. In retrospect the battery was down to about 5.5 volts, so maybe if we'd left it connected the jumper leads for 5 minutes or so it might have made the difference.

I'm off to Fraser Island for a week on Sunday, so just I'm a little bit nervous and would feel more comfortable knowing I'll be able to jump start it if I need to.

By the way, when the battery did go flat the Jeep hadn't been driven for a few days, but nothing was left on (i.e. no interior lights on, etc). The car was unlocked though and one of the doors was not properly closed. I guess something is running enough to drain the battery in that state...
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Old 01-17-2014, 08:47 PM
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Re: Battery Saga

Sometimes if using weak or thin leads, just leave the donor car hooked up and idling for 10 minutes then try and start. That's gives time for the donor car to partially charge your battery so you are not relying on the full current draw through the thin leads.
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Old 01-20-2014, 05:43 AM
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Re: Battery Saga

Quote:
Originally Posted by Swampy View Post
Sometimes if using weak or thin leads, just leave the donor car hooked up and idling for 10 minutes then try and start. That's gives time for the car to partially charge your battery so you are not relying on the full current draw through the thin leads.
Absolutely. You can start mostly anything with anything if you add time commensurate with the shitness of the equipment

Note most people forget to connect the recipient earth / negative to the engine block. This eliminates a lot of wiring and as such improves your chances considerably if the recipient is heavily discharged.

Regarding wire size... 00 BS (zero zero) is a good choice for a "solo man" set of jumper leads. You can get most jobs done in style with 0 BS if you want to save some weight. Length is a factor... the longer the lead the more copper you need. If shorter is OK then you can go down a wire gauge or two.

Remember that clamps are important too. Keep your selections balanced... there's no point using starter cable if you're going to put alligator clips on the ends!

Cheers,
Steve
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Old 01-26-2014, 07:28 PM
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Re: Battery Saga

Quote:
Originally Posted by Barboots View Post
Absolutely. You can start mostly anything with anything if you add time commensurate with the shitness of the equipment
Haha, in that case with of the shitness of the hyundai elantra I was using as a donor, the commensurate amount of time could have been in the hours
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