From mgb-v8-bounces@autox.team.net Wed Jul 17 13:46:43 2019 Return-Path: Delivered-To: mharc@autox.team.net Received: from [50.198.190.17] (localhost [127.0.0.1]) by autox.team.net (Postfix) with ESMTP id BB763A1D08 for ; Wed, 17 Jul 2019 13:46:43 -0600 (MDT) Delivered-To: mgb-v8@autox.team.net Received: from torfep01.bell.net (unknown [184.150.200.207]) by autox.team.net (Postfix) with ESMTP id 2322BA10B3; Wed, 17 Jul 2019 13:45:51 -0600 (MDT) Received: from bell.net torfep01 184.150.200.158 by torfep01.bell.net with ESMTP id <20190717194551.HLVB4584.torfep01.bell.net@torspm01.bell.net>; Wed, 17 Jul 2019 15:45:51 -0400 Received: from [192.168.2.11] (really [76.66.122.100]) by torspm01.bell.net with ESMTP id <20190717194551.LBCZ39285.torspm01.bell.net@[192.168.2.11]>; Wed, 17 Jul 2019 15:45:51 -0400 To: MGB List , MGB V8 List From: Barrie Robinson Date: Wed, 17 Jul 2019 15:45:51 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 Content-Language: en-US a=8Qp2V8J5YsdJJmJqd2TRPw==:117 a=8Qp2V8J5YsdJJmJqd2TRPw==:17 a=0o9FgrsRnhwA:10 a=r77TgQKjGQsHNAKrUKIA:9 a=gpzxpRVqtkdbOtpErbkA:9 a=QEXdDO2ut3YA:10 a=BfFpxE-qSmmPFLiyWcQA:9 a=_W_S_7VecoQA:10 EwxAG+L55G1QasX2MWjdXMGVW3fcOpnCgDevceIuoQpYoI/YZ02Mlk+kAQO7KGDr1SE0OXJRNXjoR+OA2ip5dblMMqK1W30Igh4= Subject: [Mgb-v8] Battery drain Errors-To: mgb-v8-bounces@autox.team.net This is a multi-part message in MIME format. --===============6771692604669163469== boundary="------------3E4DC1CDAB7616C51871618E" Content-Language: en-US This is a multi-part message in MIME format. --------------3E4DC1CDAB7616C51871618E Content-Transfer-Encoding: 8bit Hello folks, After leaving my MGB GT V8 for a few days - maybe 4 or 5 I find the battery is completely flat. Did that 3 times. So I took the battery out, charged it and waited 3 days. The voltage dropped from 13.15V on Sunday 3pm to 12.91V 3pm Wednesday which does not seem to indicate that it is the battery's problem? I did have a radio fitted but cannot say if it was after that that the battery went flat. So any tips on how to find out what is going on would be appreciated (and thank you in advance) - I will try to disconnect the radio but that is a pain - I have to find the special tool to slip it out !!!! But surely if the radio is off (blank screen) it should be /off./ By the way my new $$$$$ radio with windscreen mounted antenna cannot bring in 91.5FM or 99.1FM, the only stations I listen to because they do not have adverts.......but my cheap $ new portable one can get them inside my car !!!!! Cheers Barrie --------------3E4DC1CDAB7616C51871618E Content-Transfer-Encoding: 8bit Hello folks,

After leaving my MGB GT V8 for a few days - maybe 4 or 5 I find the battery is completely flat. Did that 3 times. So I took the battery out, charged it and waited 3 days. The voltage dropped from 13.15V on Sunday 3pm to 12.91V 3pm Wednesday which does not seem to indicate that it is the battery's problem? I did have a radio fitted but cannot say if it was after that that the battery went flat. So any tips on how to find out what is going on would be appreciated (and thank you in advance) - I will try to disconnect the radio but that is a pain - I have to find the special tool to slip it out !!!! But surely if the radio is off (blank screen) it should be off. By the way my new $$$$$ radio with windscreen mounted antenna cannot bring in 91.5FM or 99.1FM, the only stations I listen to because they do not have adverts.......but my cheap $ new portable one can get them inside my car !!!!!

Cheers
Barrie
--------------3E4DC1CDAB7616C51871618E-- --===============6771692604669163469== Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Mgb-v8@autox.team.net Archive: http://www.team.net/archive --===============6771692604669163469==-- From mgb-v8-bounces@autox.team.net Thu Jul 18 02:48:09 2019 Return-Path: Delivered-To: mharc@autox.team.net Received: from [50.198.190.17] (localhost [127.0.0.1]) by autox.team.net (Postfix) with ESMTP id B3DA1A1985 for ; Thu, 18 Jul 2019 02:48:09 -0600 (MDT) Delivered-To: mgb-v8@autox.team.net Received: from know-smtprelay-omc-10.server.virginmedia.net (unknown [80.0.253.74]) by autox.team.net (Postfix) with ESMTP id B82F0A076A for ; Thu, 18 Jul 2019 02:47:49 -0600 (MDT) Received: from paul ([82.34.187.196]) by cmsmtp with ESMTPA id o24qhl8cCn5AFo24qhO9ON; Thu, 18 Jul 2019 09:47:48 +0100 a=IyPoZeiKMU40TSCrbcRMyQ==:17 a=IkcTkHD0fZMA:10 a=rZV3rak9IWAtcLcpLSkA:9 a=QEXdDO2ut3YA:10 s=meg.feb2017; t=1563439668; bh=dv3PsZv8Ejsf+AfXnXlTgdzgxq05c6R65LCQscg8o60=; h=From:To:Subject:Date; b=S2fO/Wquu+18a89bd5rh0O+iUsiUEQEoQmk6gADPIMPSjvYxv3k1oO3YqtZ/1j13S 6Ffqv1RbOISpLVjGVa5c7mZp7g+Nq+HurpXl5j4ncTdO+f6pMNmE/J7zctYCP0ospE KDSyqywMhGTtPlr2ecZlCMmfUi/cWqrxPH5SnbBuBgumuKTk6GYtmHSymBNbl9EoLU qD4kFBQl1Ae+tKzK4Gxv8qMhdSOWYdteUAsICdIxKnSAPjXASYDUoA40Y4J8VQgVZf 9JTx2e5hK4BrYeepgaQPO6VgKbHrQCzE1B0kjA5XLnHmlXA3fgdHGemdS4ZxPDNVgR 5i6Is1Oqow76w== From: "PaulHunt73" To: "V8 list" Date: Thu, 18 Jul 2019 09:47:10 +0100 M1IwWA3AW9UwP7Y3XR6IdpBOC+Dm9+iU3IifGwX8GIIWZ+G4FrMNXlIy Subject: [Mgb-v8] Fw: [Mgs] Battery drain Content-Transfer-Encoding: 7bit Errors-To: mgb-v8-bounces@autox.team.net That's a significant drain, even with alarm, radio and clock it should last for 2-3 weeks. Your battery voltage off-car seems OK, but that is not a good indication of the amount of charge i.e. cranking power. If you put it back on the car after three days and it cranked OK that does indicate the battery itself is OK - up to a point. However the Lucas Fault Diagnosis Manual states that if a battery becomes 25% discharged then the on-board charging systems will never get it back to full capacity, and if it has become completely discharged they will never put back more than 50% capacity. For that reason a flattened battery has to be boost charged for a period to restore full capacity. Using a conventional charger this means charging at 16-17v for a couple of hours in a well ventilated space. Or you can use one of the more sophisticated 'maintenance' chargers but only if they have a 'recovery' program, and not all do. These charge using pulses of up to 20v. But back to the drain. If you have an analogue meter switch to its 12v i.e. VOLTS range and connect it in place of the battery earth lead. With no drains on a car with an alternator you should see a few volts registered. If it shows 12v there is a drain. In that case the first thing to do is unplug the alternator, and if the drain drops to zero that is the culprit. With the few volts registered unplugging the alternator should also drop it to zero. But if still at 12v start disconnecting things like your radio, the purple circuit fuse, remove browns from things like the ignition switch, lighting switch, starter relay, hazard fuse and so on, looking at the meter each time. If still there remove the browns from the starter solenoid, and finally the battery cable from the solenoid, but normally it will have been discovered by now. You can also do this with a digital meter but they are far more sensitive and will show 12v even with just the normal alternator leakage, and may not fully drop to zero with that disconnected if there is dampness anywhere. PaulH. ----- Original Message ----- After leaving my MGB GT V8 for a few days - maybe 4 or 5 I find the battery is completely flat. Did that 3 times. So I took the battery out, charged it and waited 3 days. The voltage dropped from 13.15V on Sunday 3pm to 12.91V 3pm Wednesday which does not seem to indicate that it is the battery's problem? _______________________________________________ Mgb-v8@autox.team.net Archive: http://www.team.net/archive