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post #1 of 11 Old 12-29-2008, 10:15 PM Thread Starter
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Electrical Issues Help!

So basically if the truck sits it wont start, the batteries are drained enough where it wont crank without the batteries being charged. I mean like if it sits for 6 hours its drained to where the batteries read like 12.x volts. Had both batteries load tested and they were good, and the alternator tested and it was good. Does anyone else have ideas?

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post #2 of 11 Old 12-29-2008, 10:48 PM
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So your saying the batteries are drained at 12V's??

Jason

"Using a thug's murderous rampage to call for gun control is like using Barack's reckless spending to call for higher taxes."

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post #3 of 11 Old 12-29-2008, 10:51 PM Thread Starter
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yeah they wont crank the truck at 12v, but when they are charged and read liek 13.6 or higher they crank just fine.

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post #4 of 11 Old 12-29-2008, 10:54 PM
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12v should start the truck. How did they test the batteries?

Jason

"Using a thug's murderous rampage to call for gun control is like using Barack's reckless spending to call for higher taxes."

--Michael Berry, American philosophizer & Talk Radio Czar, 1970-?
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post #5 of 11 Old 12-29-2008, 10:58 PM Thread Starter
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They hooked them up to a load testing machine, then ran a test through the cells, then fully charged them.

I just know in the morning if I put my voltmeter on 12.x volts wont crank it, and it dosent, but when they charge to 13.x it does just fine.

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post #6 of 11 Old 12-29-2008, 11:05 PM
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Weird.....

So does it turn over and not start or does it not crank at all?? And if it does turn over does it do it quickly or does it sound slow??

Jason

"Using a thug's murderous rampage to call for gun control is like using Barack's reckless spending to call for higher taxes."

--Michael Berry, American philosophizer & Talk Radio Czar, 1970-?
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post #7 of 11 Old 12-29-2008, 11:07 PM Thread Starter
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It turns over, and goes slow, and sputters.

03 F350 SRW CC LB 4x4
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post #8 of 11 Old 12-29-2008, 11:18 PM
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Ok, here is what I'm thinking.... If everything you say is true then I only see there being a couple of issues here.

Voltage is the energy that carries amperage to the jobsite. So without 13v your workers (amps) are not getting to the jobsite (starter). Why can't they get there?? Because they have an obstacle in the way, resistance.

Check you terminals, wires, and starter wires and relay. If you haven't done it already take off your terminals and get one of those little battery cleaner/brush doohickies and clean all 4 of them. Make sure your ground wires are tight and look good.

Jason

"Using a thug's murderous rampage to call for gun control is like using Barack's reckless spending to call for higher taxes."

--Michael Berry, American philosophizer & Talk Radio Czar, 1970-?
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post #9 of 11 Old 12-30-2008, 12:04 AM Thread Starter
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cleaned them and they are tight as well =/

03 F350 SRW CC LB 4x4
4" Lift, 33 Tires, Pro Comp Trac Bars.
CFM+ Largemouth KIT
MBRP 4" straight pipe
SCT By DJ
ISSpro Gages
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post #10 of 11 Old 12-30-2008, 04:49 AM
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Have your starter checked? A bad starter will pull lots of voltager.Sometimes 4 times as much to crank.
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