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Jake
Dodge Dakota
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4/05/2010
17:48:57
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 Subject: Dakota dead battery
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Message:
I have put 2 batteries in my 93 dakota in the past 8 months. Wondering if Ishut replace the alternator? Thanks!
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Sicko
Dodge Dakota
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4/05/2010
19:32:00
| RE: Dakota dead battery
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Check if alternator is charging 13.9 - 14.2 volts
With engine off, check the voltage at the battery (voltage drops)
Get a big DIE HARD!
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Bob Lincoln
Dodge Dakota
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4/06/2010
08:47:42
| RE: Dakota dead battery
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Message:
How often do you run it? This vintage of Dakota uses a tachometer drive board that draws 100mA with engine off. It can kill your battery in two weeks or less. I rewired mine to prevent this.
As said, check battery voltage at idle, and again the next morning before starting. Avoid Die Hard, they have a high, early failure rate. Interstate appears to be good these days, and I've had good luck with Everstart from WalMart.
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Dak92
Gen I
4/07/2010
15:56:27
| RE: Dakota dead battery
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Message:
Bob, what wires do I need to re wire for my tach?
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Bob Lincoln
Dodge Dakota
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4/08/2010
09:11:36
| RE: Dakota dead battery
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Message:
You should verify first whether the battery is drawing 100mA or more with engine off. The tachometer drive board is a daughter card off the main instrument board behind the dash. I found that it is wired to both the ignition and the battery, and that the design of it allows a transistor to be turned on and draw the battery to ground through a zener diode. I cut the circuit trace on the board to the battery and jumpered it to the ignition, since a tach doesn't require power when off. It works fine and there is no draw on the battery from it now. I'll have to scan and post a diagram of where to rewire it.
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