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why is my starter draining my battery, or is it?

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Old Aug 2, 2010 | 09:02 PM
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xjrwithproblems's Avatar
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Default why is my starter draining my battery, or is it?

Well, my battery has been heavily draining recently. About a full volt in about 30 minutes. i went to start it today and it wouldn't turn over but i checked the voltage and it read 13.21v. I would assume that this should easily turn the motor over, right? I plug my battery to my trickle charger for about an hour to get it up to 14.5v, and then observe with the voltometer as it drops .01v per second. I remove the starter wires at the B+ bulkhead and continue to observe the voltometer, it stopped draining. SO, why is my starter draining power? is it a bad starter. bad wiring somewhere.
 
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Old Aug 2, 2010 | 10:01 PM
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That really doesn't sound like a starter but something is draining the battery. Perhaps an alternator diode? Where exactly are you disconnecting the starter?
 
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Old Aug 2, 2010 | 10:53 PM
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i disconnected the starter from under the hood on the passenger side where the two wires are connected through a bulkhead under the engine storage compartment. If it is in fact my starter that is draining power, i think i may just fab up a relay to where power is only available when the ignition is activated.
 
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Old Aug 3, 2010 | 05:04 AM
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Here is the electrical schematic for the battery/starter system. There is already a relay for the starter solenoid and I don't really think you want to want to install a relay capable of handling the starter current.

Still doesn't sound like the starter/solenoid.
 
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Jaguar Starter Schematic.pdf (73.5 KB, 334 views)
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Old Aug 6, 2010 | 12:20 AM
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hey test point. You were right, it wasn't my starter, it was my bpm, wasn't grounding properly. Got it all sorted out. thanks for the diagram.
 
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Old Aug 6, 2010 | 06:50 PM
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Originally Posted by xjrwithproblems
hey test point. You were right, it wasn't my starter, it was my bpm, wasn't grounding properly. Got it all sorted out. thanks for the diagram.
What is the BPM, please?
 
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Old Aug 6, 2010 | 07:04 PM
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Body Processor Module
 
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