Battery Drain - Land Rovers Only

gregory.pearson · 12-01-2007, 01:12 PM

Seeking some advice for my neighbor who has a problem with the wiring in his 88 or 89 Classic ...

Here are the symptoms :

Replaced a dead alt with a brand new one, the truck runs great and can be driven all day. However when darkness falls, and the trucks lights are put on, the battery drains and quickly dies.

Any advice as to where to begin looking for such a wiring short?

Anyone had a similar problem before?

Do we have to make an offering to the Lucas gods?

Thanks for any insight !

pie4foou · 12-04-2007, 09:19 AM

humm.... does it drain when the car is off and just sitting?

Disco Mike · 12-04-2007, 02:12 PM

Unhook the alternator at night, if the battery isn't dead in the morning, you got a bad new alternator.
Mike

gregory.pearson · 12-04-2007, 02:14 PM

Nope, strangely its only draining when the lights are flipped on. It runs and sits fine as long as they're off.

I lent him my trusty 'ol owner's manual with the wiring diagram, but I don't think he's gotten very far. It's dissapointing because this is/was the better of his two Classics.

carlosz · 12-04-2007, 05:35 PM

test alternator output under load, that shall tell you, is the alt connected properly? how is the battery, does it have a full charge, does it hold charge?

OkieRover · 12-04-2007, 05:35 PM

My alternator was the cause as well. If you got real close you could actually hear a high pitch sound coming from it.

pie4foou · 12-07-2007, 08:24 AM

I had a drain on my battery and it would die pretty much over night and i couldnt find out what it was.... i took it to my uncle's shop and he said that theres a drain on one of the interior lights even though non of them are lit up... put a negative disconnect and its worked fine for me, sounds like a diffrent problem then what you have sry

12-01-2007, 01:12 PM	#1 (permalink)
gregory.pearson 1990 RRC Join Date: Sep 2007 Location: Newport, Rhode Island Posts: 55 Gallery: 0	Battery Drain Seeking some advice for my neighbor who has a problem with the wiring in his 88 or 89 Classic ... Here are the symptoms : Replaced a dead alt with a brand new one, the truck runs great and can be driven all day. However when darkness falls, and the trucks lights are put on, the battery drains and quickly dies. Any advice as to where to begin looking for such a wiring short? Anyone had a similar problem before? Do we have to make an offering to the Lucas gods? Thanks for any insight !

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12-04-2007, 09:19 AM	#2 (permalink)
pie4foou fuddmucker Join Date: Nov 2007 Location: CT/RI area Posts: 102 Gallery: 2	humm.... does it drain when the car is off and just sitting?

12-04-2007, 02:12 PM	#3 (permalink)
Disco Mike Moderator Join Date: Aug 2004 Location: Parker, Colorado Posts: 5,760 Gallery: 0	Unhook the alternator at night, if the battery isn't dead in the morning, you got a bad new alternator. Mike

12-04-2007, 02:14 PM	#4 (permalink)
gregory.pearson 1990 RRC Join Date: Sep 2007 Location: Newport, Rhode Island Posts: 55 Gallery: 0	Nope, strangely its only draining when the lights are flipped on. It runs and sits fine as long as they're off. I lent him my trusty 'ol owner's manual with the wiring diagram, but I don't think he's gotten very far. It's dissapointing because this is/was the better of his two Classics.

12-04-2007, 05:35 PM	#5 (permalink)
carlosz Senior Member Join Date: Nov 2004 Posts: 107 Gallery: 0	test alternator output under load, that shall tell you, is the alt connected properly? how is the battery, does it have a full charge, does it hold charge?

12-07-2007, 08:24 AM	#7 (permalink)
pie4foou fuddmucker Join Date: Nov 2007 Location: CT/RI area Posts: 102 Gallery: 2	I had a drain on my battery and it would die pretty much over night and i couldnt find out what it was.... i took it to my uncle's shop and he said that theres a drain on one of the interior lights even though non of them are lit up... put a negative disconnect and its worked fine for me, sounds like a diffrent problem then what you have sry

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