My car's alternator was replaced last year jan 2007. new battery as well...in the last week or so car not holding charge at all.if charged overnite, will last one to two days. does my car have a voltage regulator ? could this be the problem and if so where is it located?
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Re: loss of charge on 91 loyale station wagon
The regulator is in the alternator. it sounds like it isn't charging the battery anymore. battery voltage should be around 14 volts with engine running. also check connections at alternator to battery. have seen corrosion here keep the battery from charging
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Did you replace cable ends? Sometimes the cable side gets corroded inside the wire covering. May look like the battery is clean of corrosion and well attached but it's the cable side the battery post fitting. Try changing the ends. A cheap and easdy solution.
Wouldn't be a fuse, but it seems as if the alternator is still not putting out normal power, or else your battery has a problem taking a charge. Better have the battery tested for a dead cell. also see what a voltmeter says about alternator output now. If you have an electrical problem in the wiring somewhere or in the alt. charging controls, then possibly one or more of the diodes in the alternator may got burnt out. That means the alternator puts out less power.
On some newer cars, the engine computer, pcm, controls the rate of charge of the alternator. So you have to be careful diagnosing -know how your system operates. That's why mechanics always ask for year, make, model, and engine size if applicable.
Could be a combination of things, they put in new battery but did they test charging system (Alternator) Your alternator might not be charging properly and you've been running on battery power. You've probably run the battery down so low that there's not enough power to run ignition but enough for lights etc. Jump start and bring to repair shop that you frequent and have them test your charging system.
I would look at the alternator. I had a grand am that would do that to me, even with a brand new battery. The alternator output wasn't able to run the vehicle and charge the battery. Alternators are picky things, especially being in Canada (which I assume from the KM), the hot and cold cycles don't play nicely with the brushes and core. I'd have the alternator checked and replaced if needed.
Check all your fuses if you had a system failure it could have blown a fuse. I am not sure on your vehicle where the fuse is in the car or under the hood it could also have a relay. You can check your alternator by checking the voltage at the back of the alternator where the big wire bolts on. You should have 14+ volts at the alternator.