Car won't start - dead battery - Toyota Nation Forum : Toyota Car and Truck Forums
Prius 1st Gen - Hybrid (1997-2003) Toyota Prius Hybrid discussion for years 1997-2003.

 
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post #1 of 4 Old 02-28-2016, 02:30 PM Thread Starter
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Car won't start - dead battery

2001 Prius

Hi folks,

Our trusty 2001 Prius won't start.

A multimeter shows about 5.5 V on the Optima battery.
With the ignition key in the "On" position there is a weird noise coming from the relay box in the engine compartment.
Nothing electrical of course works (headlights, horn).

Should I just go ahead and get a replacement battery or do some more investigating?
Battery must be at least 5 years pld - probably longer.

Cheers
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post #2 of 4 Old 02-28-2016, 07:06 PM
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Most auto parts shops will test your battery. That will give you an answer. Optimas are good batteries but not a forever battery.
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post #3 of 4 Old 02-29-2016, 10:46 AM
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The test is done for now, now try charging it preferably slowly to full and Then test it. If over 3-4 years old in extreme cold or heat operation it probably needs t/be replaced anyway but worth a try. Luck. :cowboy:
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post #4 of 4 Old 03-09-2016, 12:44 PM
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Optima redtop batteries really are no better than anything you can get off the shelf - they were bought out several years ago, and the only quality attribute is they can be mounted in any direction.... otherwise, you're buying into a name.

Pull the battery out and try to charge it out of the car - that will tell you:
1) if the battery will take a charge or not
2) if the battery does take a charge, there could be a draw in the car

1) Frame-off "Rusto-Mod" FJ40/350/350 2) 2001 Lexus LX470 3) 2017 Prius V4
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