Block Heater/Battery Drain - Ford Powerstroke Diesel Forum
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  #1  
Old 11-08-2010, 09:24 AM
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Angry Block Heater/Battery Drain

If anyone can help. I have a '99 F-250 7.3 PSD. Can a factory block heater being plugged into house power drain the trucks batteries? This may just be happening all at the same time but the last 2 mornings after having it plugged in I have found both batteries completely drained. No shorts or lights left on as far as I can tell. Both batteries had been fine, as far as I know, up until now and they are not that old. Any ideas?
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  #2  
Old 11-08-2010, 09:45 AM
shhhhh, can you hear it?

 

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if the batts are bad its possible the cold just did them in.tends to happen in the winter.i think you might want to start looking for shorts though.
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Old 11-08-2010, 09:55 AM
Shaking the Bush Boss
 

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yea, the block heater is its on animal... not tied into the trucks elec system in any way.
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Old 11-08-2010, 09:58 AM
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Thanks for advice. Will look for shorts.
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Old 11-09-2010, 06:40 PM
Johnny Law Brown

 

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You might do a parasitic drain test to that will tell you right off if you have a drain on the system and what circuit its in
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