2004 battery drain - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 8 (permalink) Old 07-29-2014, 06:26 PM Thread Starter
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2004 battery drain

Have a 04 and passenger side battery has bad connection on red wire that supplys altenator circuit. The connection was intermittent and is now repaired. There is a heavy draw on the red wire. I have to disconnect otherwise batteries will totally discharge. I suspected leaky diode in alternator. Replaced altenator but no change. Resistance to ground shows no short. ANY ideas?
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post #2 of 8 (permalink) Old 07-29-2014, 06:51 PM
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Clean ALL of your battery and ground connections. Corroded connections do leak power to ground, killing the batteries.

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post #3 of 8 (permalink) Old 07-29-2014, 09:16 PM Thread Starter
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Battery drain

I checked all connections. I have a 10 amp draw with batteries out of circuit on small red cable
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post #4 of 8 (permalink) Old 07-29-2014, 11:06 PM
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With the engine shut off put a wrench to the pulley if it is attracted then the alternator field is not shutting down.
Just a thought!

1988 ford van fresh overhaul, 1991 nissan pick-up 1993 Caprice 2000 GMC S10 Blaser 2007 nbs 3500 GMC 4x4 crew-cab long box 17 inch single wheels Duramax Alison. BW turnover Ball. Furakawa FL35 loader. Retired, HD mechanic, worked on engines all my life. Fabricator welder. electrician. in the process of finishing my new shop. Live in Rock Creek B.C. Wife has a fruit stand.
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post #5 of 8 (permalink) Old 07-30-2014, 06:56 AM
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The large red wire goes directly to the battery positive (sometimes thru a fuse link). If you have a load on it your alternator or regulator is bad.
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post #6 of 8 (permalink) Old 08-05-2014, 05:23 PM Thread Starter
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Battery drain

Finally got back to battery issue. Dug out old ammeter. Draw on battery to cab is 300 ma. On red to alternator it is 1.4A. Disconnect alternator it is still same. Problem points to glow plug controller.
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post #7 of 8 (permalink) Old 08-05-2014, 05:43 PM
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How did you arrive at that conclusion? There are many other things that draw power when the key is off, like radios.

Dave

2004 Ford F-350 Regular cab with 6.0.
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http://bennettlaneshopping.com/ - Our Outdoor/Garden and Kitchen Ware store
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post #8 of 8 (permalink) Old 08-29-2014, 05:59 PM Thread Starter
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Battery Drain

I monitored draw with ammeter as I removed all fuses. There was no change so I went back under hood. Only thing that could draw high current was altenator or controller. It was glow plug controller. Most probable cause was broken wire on postive post on battery. Ir must have arced.
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