Battery Draining

cmumby said:

Hi All
Just collected my RR yesterday and this morning I had a flat battery. Battery is new so I guessed something must be draining it. With no keys in the ignition I can hear a ticking sound that is coming from the Alternator. Disconnect the battery and it stops. Any ideas?

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fentigerover said:

A clock and burglar alarm shouldn't take much, should they? As I said, to isolate it completely, remove the fusible link.

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Datatek said:

Since you can't separate the feed for the clock and alarm from all the other circuits at the battery, your gadget should have no effect on battery drain. All it will do is stop the car being started because the fusible link will blow.

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fentigerover said:

Removing the fusible link has the same effect as removing the negative battery lead, so no power to clock - or anything else, ergo, stops battery drain. IKNOW you could just diconnect the battery lead, the Discarnect makes it simpler to do?
Jeeze, don't some peope nitpick!

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Datatek said:

You said it leaves the clock and burgler alarm connected but nothing else which is bollocks Don't know how pointing out that you are talking out of your arse can be described as nitpicking and it's fair enough to warn others that what you said is incorrect.

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fentigerover said:

OK, sorry I spoke. Put it this way, my Range Rover gets left standing for two to three weeks at a time, and I used to get a flat battery. Since fitting the Discarnect, even leaving the fusible link fitted, I don't get a flat battery. If that's bollocks, then I stand corrected. Or are you just whinging at my description of it?[/quote]

No, you description was factually incorrect, the Discarnect spec actually says " disconnect your starter motor" nothing else and if the electronics remain connected and are not the cause of your flat battery, then I would be looking at the starter motor and it's wiring for potential problems that could result in an electrical fire. I can leave my P38 for 3 weeks at a time no problem, for longer or where there may by external influences waking the BECM, I use a solar panel.

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Datatek said:

fentigerover said:

OK, sorry I spoke. Put it this way, my Range Rover gets left standing for two to three weeks at a time, and I used to get a flat battery. Since fitting the Discarnect, even leaving the fusible link fitted, I don't get a flat battery. If that's bollocks, then I stand corrected. Or are you just whinging at my description of it?[/quote]

No, you description was factually incorrect, the Discarnect spec actually says " disconnect your starter motor" nothing else and if the electronics remain connected and are not the cause of your flat battery, then I would be looking at the starter motor and it's wiring for potential problems that could result in an electrical fire. I can leave my P38 for 3 weeks at a time no problem, for longer or where there may by external influences waking the BECM, I use a solar panel.

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OK, so educate me. With the ignition switched off (and the ride height inhibit switch on) what else remains powered up?

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fentigerover said:

Datatek said:

OK, so educate me. With the ignition switched off (and the ride height inhibit switch on) what else remains powered up?

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BECM, RF receiver, part of the engine ECU circuitry, alarm and the EAS wakes up every 6 hours to carry out a self level. There is also power to the interior lights, clock and the starter motor. That is not an exhaustive list. The ride height switch is irrelevant, it will still try to self level every 6 hours if it has dropped at all.

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Datatek said:

fentigerover said:

BECM, RF receiver, part of the engine ECU circuitry, alarm and the EAS wakes up every 6 hours to carry out a self level. There is also power to the interior lights, clock and the starter motor. That is not an exhaustive list. The ride height switch is irrelevant, it will still try to self level every 6 hours if it has dropped at all.

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Quite exhaustive, but surely if interior lights aint on, no power taken, and it aint going to drop any further than the bump stops. Fact still remains, since fitting discarnect, even with the fuse in place, no more flat batteries. Must be magic, as we all know electrics are a black art!

Hope the guy who raised the flat battery issue has had some luck solving it.

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fentigerover said:

Datatek said:

Quite exhaustive, but surely if interior lights aint on, no power taken, and it aint going to drop any further than the bump stops. Fact still remains, since fitting discarnect, even with the fuse in place, no more flat batteries. Must be magic, as we all know electrics are a black art!

Hope the guy who raised the flat battery issue has had some luck solving it.

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When you fitted the discarnect,you probably disturbed the battery cable and possibly others as well and disturbed a point where a cable had chaffed partially through to ground and was providing a relatively high resistance path to earth ,causing your battery drain

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