Question about Sierra Voltage Regulators Voltage Regulator 5723 UPS System

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Starting probs Having fully charged the battery and put it on the car, the battery light goes out when the car has started but when I stop the engine the lit comes on again, does this indicate that the alternator is at fault?

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Ok.... quick test that you can do at your own risk as i'm told it is dangerous.... wear safety googles at the very least... start the car... unhook the battery.... if the car dies... it's the alternator... if it keeps running... it's the battery.... loosen the bolt on the battery post before you start it so it's easy to take off.... after you have removed the connector and determined which is at fault... don't hook up the cable again untill after you shut off the car.... what you need to guard against is creating a spark....


Robert

Posted on Dec 16, 2008

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Why is fully-charged battery too low to start within 6 hours?


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Left lights on my jeep cherokee have recharged battery but it goes flat with in minutes and engine dies


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Daughter called me ..car wont start. checked battery at Autozone...it is good. someone stopped to help them and bang on startere and it starts up. Bad starter. Starter replaced. Next day daughter...


it sounds like you have blown fuse to the Alternator.. I don't know what car you are talking about but they charging systems vary.. But if alternator isn't getting all the power it needs it won't charge. this should be checked.

good luck

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Ok here is a weird one, my truck has power, I put the key in, and I have no chip in my key by the way, I turn the truck on it goes through the motions, when I hit the start position all it does is goes...


I have seen this before. And I would almost bet your Battery Voltage at the starter will be 6 Volts or below 9 Volts. It is a combination of several things. There are some TSB solutions for electric problems but you need to get a code from a scanner. Autozone, Oreillys and Advance will scan for free. But your particular problem may not set a "check Light"

If your Battery is not fully charged, which would be 13.2-13.6 Volts, you can have problems from the Antitheft system. When activated the Antitheft system drops the Voltage to a level the starter will not work with, to prevent theft. Have your Battery draw tested and if replaced, only put in a fully charged battery.

Another thing that can happen is intermittent charging. Even with a jumper vehicle, your truck will start and within 3 minutes of having the boost removed your own truck will fail to charge. People have stalled their trucks at 70MPH or after driving for hours they have a dead battery. The dash Voltmeter will indicate a discharge but most people do not look at the gauges.

I suspect if there is a Battery Saver system in the truck, it is that system which may be breaking the power connection to save power from the drain. Unfortunately the drain is the engine running or the starter trying to work. So I suspect the Battery Saver can be a part of the starting problem too!

I hope my solution is very helpful to you. You need further testing to sort this out. I would like to know what you find out to fix this problem.

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check and clean the battery posts first. Do the headlights work ok, and dim when you turn key to start?
Any clicking?

Try staarting in neutral. turn key to on, apply brake, shift to neutral, try to start.

report results

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I was wondering if there was a way to get the codes from the computer off of my 1999 jeep grand cherokee. one day it just stopped working and i'm pretty sure it's the alternator but not sure. help!!


sure!can you charge battery? if won't start charge the battery and take it to nearest autozone or advance auto parts and as long as your check engine light is on,,, they will code read for free, then they will tell you what or where problem is.if not then try this,,,put in fully charged battery,start it,,disconnect the positive cable from battery while engines running,careful not to let the positive cable come in contact with any metal of car, if engine dies,,altenator not charging,may be bad diode in back of the altenator or blown fuseable link inbetween starter and altenator.hope this helps and if so please note so in response. thank you for choosing fixya.com

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