So I come out to my truck I have not started it in about 3 days and it won't start I replaced the water pump the alternator and put in a new battery now my truck runs great but only for a day it it doesn't hold the charge overnight I've had to jump it every morning any solutions?
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Hey there Justin it sounds like you have a paracidic draw this video is an excellent guide to understanding what it is and how to find it
https://www.youtube.com/watch?v=KF1gijj0...
This should help
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Not 100% sure, but I have a few things you could check.
1. Have you checked your voltage on your battery connections while running and not running to ensure your alternator is charging?
2. Do you have anything plugged into the cigarette lighters/ power jacks on the inside of the truck over night? Aftermarket stereo installed? Radio unit, amplifier, or subwoofers?
3. Alternator: Brand new or refurbished? Sometimes refurbished units can be bad.
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It's a new alternator, I found that the plug to the alternator wasn't fully plugged in when I was working on It today...im gonna see what that does in the morning hopefully I don't have to boost jump it
Hi Justin,
Don't know your vehicle but is the battery warning light on the dash coming on when you turn on the ignition (before you turn further to start the engine) and then turning off when the engine starts?
Just to make sure that you get the warning if there is a problem.
Also if you do a lot of start/stop engine driving i.e. short trips, it might take a while for the battery to come up to full charge.
I hear you. Same on my s10 2000 p/u. Just purchased used a few months ago. All your issues similar to mine. 3A jumped me 4 times. The alternator is putting out ok. Could we be looking for a wire short? If so, I understand that’s going to run into $. LD Stockton Ca
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When you jump your truck, you are placing the clips on the cables, NOT the battery terminals.
Therefore, the first thing to check is for clean battery terminals and cable connectors.
Then, measure the voltage at the battery terminals, not on the cable. Fully charged should be at least 12.6V.
If it is in the 12.0 or lower range it is discharged.
Once it is running, again measure the voltage. It should be between 13.6 and 14.6 for a standard flooded battery.
Otherwise, it isn't being charged.
If all that checks out, then start looking for the parasite that is draining the battery.
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I had this issue and found the answer from a friend of mine that ran several GM Dealer Service Depts in our region for many years.
Not saying you shouldn’t check for a parasitic draw. I did as well and found no indication of a parasitic draw.
What my friend told me is that there was a GM Service bulletin for my 2007 Tahoe (and other year and similar models) that you needed to change the Negative Battery cable. The bulletin indicates that the cables develop higher resistance over time and that keeps the battery from fully recharging. I thought this sounded odd, but if you really think about it, it makes absolute sense. Everyone (including me) thinks that if the alternator is producing enough Volts, that you’re golden. But nothing could be further from the truth.
The thing that keeps your battery charged isn’t Volts alone, but the Current, or Amps, that are able to flow to the battery. Too many Ohms, or Resistance, less Amps, or Current flows to the battery. Volts divided by ohms equals Amps.
Long story short, I replaced the Negative battery cable and problem solved. If you can’t find a parasitic draw and have tried other things, you might change the negative battery cable. But be ready if you do it yourself! Not fun….goid Luck!
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Technically, the high resistance of the cable drops VOLTAGE. Therefore, the voltage across the battery is reduced, so the battery can never get to full voltage. If the voltage were 14.6V across the battery (standard FLB) and the current were limited, it would still fully charge eventually.
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Hi,
Use a DMM's (Digital Multimeter) Voltmeter function to test if the battery is being charged at the correct rate.
Start the engine and connect the meter across the battery terminals. You should measure between 13.8V -14.2V DC to keep the battery correctly charged.
if it is not between these values check the alternator (or more correctly the regulator) which is in the alternator. If it is a "new" alternator take it back to where you got it from.
Be careful as the engine is running.
jayeff tarafından
Otherwise, take it to Sears or Autozone after a jump, and they can check your alternator for you for free.
S W tarafından