 | Home > Technical > Anyone good with test meters? |
 
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554  |
yes on the 0 to 16 amp rang
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10th Dec 2017 7:11pm |
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| v8bobber Member Since: 26 Aug 2012 Location: pembrokeshire Posts: 448  
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So is that a yes to it being 10 and 70 milliamps?
Or yes that is too much of a drain? Not too confident on the old Meter scales...... |
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10th Dec 2017 7:33pm |
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| miker Member Since: 13 Sep 2015 Location: Surrey Posts: 1768 
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70 mA is correct.
Personally I wouldn't be worried by a 70mA drain, though I've never actually checked the residual drain in my battery. That's around 2Ah a day for reference! |
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10th Dec 2017 7:50pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20545
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The clicking you mention can be down to high earth resistance and commonly insecure battery clamps.
70mA is a little high, but wouldn't cause you problems that fast. I had issues once at around 220mA and that would be flat after two days, or not enough juice to crank anyway. Have you checked your readings with all your interior lights completely off? And also, have you checked your battery voltage with alternator running? Should be around 14.2v. KEEP CALM AND Drill ON 🇬🇧🏴🏴🏴🇮🇪🇺🇸⛽️🛢️⚙️🧰💪 |
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10th Dec 2017 7:56pm |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
yes 70mA if swap pos lead on meter to right mA v socket make Meter scales reading more sense |
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10th Dec 2017 7:58pm |
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| v8bobber Member Since: 26 Aug 2012 Location: pembrokeshire Posts: 448
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The reading with everything off, ie doors shut, everything off, is 10(ish) milliamps. Whatever problem I have is compounded by the fact that I do relatively short journeys to charge up the battery, maybe less than a mile or so each way and the vehicle could sit for a day or two then. It’s not been a problem up till now. |
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10th Dec 2017 8:35pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20545
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The colder weather would add to the issue, sounds like you could possibly benefit from a deep cycle battery with a better reserve capacity. Plus useful to know if the alternator is up to correct charging current which I'm pretty sure it will be.
When you had the battery flat issue, was that with the 70mA accessory connected? I am assuming so in this case. Have you had any issues at all with it not connected? KEEP CALM AND Drill ON 🇬🇧🏴🏴🏴🇮🇪🇺🇸⛽️🛢️⚙️🧰💪 |
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10th Dec 2017 8:44pm |
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| v8bobber Member Since: 26 Aug 2012 Location: pembrokeshire Posts: 448
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There is a whopping “Varta” battery on there at the moment and I think it’s the one that came with the vehicle, but clearly not the original one. I know batteries are expensive but I don’t mind investing in another better one as I have another project on the horizon that I could use the current (see what I did there...) battery.
I know I checked it a couple of days ago, but did it again this evening and with the engine running she’s putting about 14.5 volts in the battery. The accessory I am referring to is an aftermarket tracker, and a well known one at that! I don’t want to name and shame them just yet as I have been having other issues with them, but yes the issue with the battery going flat was with it connected. Thankfully it was the first thing I tried, led there by the other problems I’ve had with it over the last couple of weeks. I’ve left is disconnected now and she’s locked in the shed to see if the problem persists. Thankfully I’ve got the old 2.5na 90 to use which at the moment I am loving because of its simplicity Dave |
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10th Dec 2017 10:41pm |
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| RoddyK05 Member Since: 08 Apr 2015 Location: Inverclyde Posts: 633  
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If you are using it as infrequently as you say, I’d stick a battery charger on it every now and then regardless of whether you have a slight drain or not. Especially with the cold weather with us just now, it was -2° all day here. Obviously I have no idea how your tracker is fitted, but is it not supposed to pull a wee bit of current to keep it going? Good you have a N/A 90 too, i had that engine in my series 3 and loved it
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10th Dec 2017 11:44pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20545
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Many trackers without going into detail pull current that is very low temporarily for a reason, but doesn't draw permanently.
That being said, isn't normally a problem. I would think about a new Genuine battery and a charger due to infrequent short journeys you are doing as mentioned above.
14.5v with the motor running definitely suggests your alternator is in perfect working order. KEEP CALM AND Drill ON
🇬🇧🏴🏴🏴🇮🇪🇺🇸⛽️🛢️⚙️🧰💪 |
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11th Dec 2017 12:26am |
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| v8bobber Member Since: 26 Aug 2012 Location: pembrokeshire Posts: 448
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I was sticking it on a charger now and again anyway but the way it is at the moment it would have to be every day pretty much. It’s just not practical. I was in the habit of taking it for a run after work if I finished late.
I will see how I get on with it now the tracker is unplugged. It can stay safely locked in the shed for now. Yes, the 2.5 na 90 is great. I’m warming to it all the time and I think it’s a keeper. I love the fact it’s so basic, no radio, no clock, nothing. I even like the fact it takes 20 seconds of preheat to get the thing going in the morning - and that’s in the warm!  |
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11th Dec 2017 12:39am |
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